go语言学生管理系统 go语言图书管理系统

C语言设计学生成绩管理系统

在win-tc 下编辑的：

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程序如下:

#include "stdlib.h"

#include "string.h"

#include "stdio.h"

#define NULL 0

#define Q 10

#define LEN sizeof(struct student)

struct student /*定义一个学生考试信息的结构体*/

{char name[Q]; /*用来存放姓名的*/

char sex[Q]; /*用来存放性别的*/

long id; /*用来存放准考证号的*/

int score[4]; /*用来存放分数的*/

int total; /*用来存放总分数的*/

int m_c; /*用来存放名次的*/

struct student *next;/*定义指向下一个结构体的指针*/

};

int n; /*用来统计考生人数的*/

char ch[Q]; /*用来存放姓名的*/

struct student *creat() /*定义一个指向struct student的结构体指针函数*creat()用来修改考生信息.*/

{int i;

struct student *head,*p1,*p2;/*定义三个指向struct student的结构体指针*/

p1=p2=(struct student *)malloc(LEN);/*调用malloc()函数用来开辟一个新的存储单元*/

n=0;

printf("请输入学生考试信息!\n");

printf("请在姓名处键以\"！\"结束输入。\n");

printf("姓名:");

scanf("%s",ch);

head=NULL; /*给指针head赋初值*/

while (strcmp(ch,"!")!=0) /*调用字符比较函数strcmp()用来判断是否继续输入*/

{p1=(struct student *)malloc(LEN);/*调用malloc()函数用来开辟一个新的存储单元*/

strcpy(p1-name,ch); /*将循环结构前面输入的姓名复制到结构体名为p1的数组name中*/

printf("性别:");

scanf("%s",p1-sex);

printf("准考证号(8位):");

scanf("%ld",p1-id);/*将输入的准考证号存放到p1所指结构体的数组id中*/

printf("数学成绩:");

scanf("%d",p1-score[0]);/*将输入的数学成绩存放到p1所指结构体的数组score中*/

printf("物理成绩:");

scanf("%d",p1-score[1]);/*将输入的物理成绩存放到p1所指结构体的数组score中*/

printf("英语成绩:");

scanf("%d",p1-score[2]);/*将输入的英语成绩存放到p1所指结构体的数组score中*/

printf("C语言成绩:");

scanf("%d",p1-score[3]);/*将输入的C语言成绩存放到p1所指结构体的数组score中*/

p1-total=p1-score[0]+p1-score[1]+p1-score[2]+p1-score[3];/*计算总分 */

if(n==0)head=p1;/*如果是输入第一组学生考试信息就将指针p1赋给指针head*/

else p2-next=p1;/*否则将p1赋给p2所指结构体的next指针*/

p2=p1;/*将指针p1赋给指针p2*/

n++; /*将n的值加1*/

printf("姓名:");

scanf("%s",ch);/*将输入的姓名存放到字符数组ch中*/

}

p2-next=NULL;/*将p2所指结构体的next指针重新赋空值*/

return (head);/*将输入的第一组学生考试信息返回*/

}

void output(struct student *head) /*定义output()函数将考生的信息从头指针所指内容开始输出*/

{struct student *p;/*定义一个指向struct student的结构体指针p*/

printf("-----------------------------------------------------------------------\n");

printf(" *学生考试成绩信息表*\n");

printf("-----------------------------------------------------------------------\n"); /*71个“-”*/

printf("准考证号 姓 名 性别 数学 物理 英语 C语言 平均分 总分\n");

printf("-----------------------------------------------------------------------\n");

p=head;/*将头指针赋给p*/

if(head!=N)

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寻高手帮忙做个关于学生成绩管理系统的C语言程序！

分是少了点，不过好心的我就帮帮你吧，呵呵！

你以上的功能我的程序里全有，你自己看看改改吧！

#include stdio.h

#include malloc.h

#include string.h

#include stdlib.h

#define InputRcd 1

#define UpdateRcd 2

#define SelectRcd 3

#define Exit 4

#define NAMELEN 16

#define CLASSLEN 6

struct record {

char classID[CLASSLEN];

int term;

char name[NAMELEN];

int chinese,math,english;

};

void showProgInform()

{

printf("-------------------------------------------------\n");

printf("| *** STUDENTS' SCORE PLATFORM *** |\n");;

printf("-------------------------------------------------\n\n");

}

void showMenu() {

system("cls");

showProgInform();

printf("Please select an operation fo the following MENU: \n");

printf(" 1. Input a record \n");

printf(" 2. Update a record\n");

printf(" 3. Select record(s)\n");

printf(" 4. Exit. \n");

}

void inputRecord() {

struct record inscr;

FILE * fp;

system("cls");

showProgInform();

printf("Mention: You are to add new record\n\n");

printf("Please input by the following instructions: \n");

printf("Class ID: ");

scanf("%s",inscr.classID);

printf("Term Number: ");

scanf("%d",(inscr.term));

printf("Student Name: ");

scanf("%s",inscr.name);

printf("Chinese score: ");

scanf("%d",(inscr.chinese));

printf("Math score: ");

scanf("%d",(inscr.math));

printf("English Score: ");

scanf("%d",(inscr.english));

getchar();

if((fp=(fopen("stu_score.rcd","ab+")))==NULL) {

printf("Input record failed!\n");

return;

}

fwrite(inscr,sizeof(struct record),1,fp);

fclose(fp);

if((fp=fopen("stu_score.txt","ab+"))==NULL) {

return;

}

fprintf(fp,"%s-%d %s: %d %d %d\r\n",inscr.classID,inscr.term,inscr.name,inscr.chinese,inscr.math,inscr.english);;

fclose(fp);

}

void showSingleRecord(struct record rc) {

printf("%s-%d %s: (CHI)%d (MAT)%d (ENG)%d\n",rc.classID,rc.term,rc.name,rc.chinese,rc.math,rc.english);

}

void updateRecord()

{

long fsize,arraySize,i;

struct record *allRecords,newRcd;

int hasFound = 0;

FILE * fp;

FILE * txt;

system("cls");

showProgInform();

if((fp = fopen("stu_score.rcd","rb")) == NULL ) {

printf("! No records , cannot operate\n");

return;

}

printf("Mention: You are to update record\n\n");

printf("Please the record you want to update by the follow mention: \n");

printf("Class Id: ");

scanf("%s",newRcd.classID);

printf("Term number: ");

scanf("%d",newRcd.term);

printf("Student name: ");

scanf("%s",newRcd.name);

fseek(fp,0,SEEK_END);

fsize = ftell(fp);

arraySize = fsize/(sizeof(struct record));

allRecords = (struct record *)calloc(arraySize,sizeof(struct record));

rewind(fp);

fread(allRecords,sizeof(struct record),arraySize,fp);

for(i=0;iarraySize;i++) {

if(strcmp(newRcd.classID,allRecords[i].classID)==0 newRcd.term==allRecords[i].term strcmp(newRcd.name,allRecords[i].name)==0) {

printf("Find the matching record: ");

showSingleRecord(allRecords[i]);

printf("Input new Score: \n");

printf("New Chinese Score: ");

scanf("%d",(allRecords[i].chinese));

printf("New Math Score: ");

scanf("%d",(allRecords[i].math));

printf("New English Score: ");

scanf("%d",(allRecords[i].english));

printf("After update ,the records is : \n\t");

showSingleRecord(allRecords[i]);

printf("\n");

hasFound = 1;

break;

}

}

fclose(fp);

if(!hasFound) {

printf("No matching record has found!\n");

free(allRecords);

return;

}

if((fp = fopen("stu_score.rcd","w"))==NULL) {

printf("Write file stu_score.rcd failed\n");

return;

}

if((txt = fopen("stu_score.txt","w"))==NULL) {

printf("Write file stu_score.txt failed\n");

return;

}

fwrite(allRecords,sizeof(struct record),arraySize,fp);

for(i=0;iarraySize;i++) {

fprintf(txt,"%s-%d %s: %d %d %d\r\n",allRecords[i].classID,allRecords[i].term,allRecords[i].name,allRecords[i].chinese,allRecords[i].math,allRecords[i].english);

}

free(allRecords);

fclose(fp);

fclose(txt);

}

void showSelectMenu(char classID[],int term) {

system("cls");

showProgInform();

printf("Mention: All the following opertion based on classID: %s,Term: %d\n\n",classID,term);

printf("Mention: You are to select the records\n\n");

printf("\t Please choose an operation: \n");

printf("\t 1. Select all records of the classID.\n");

printf("\t 2. Sort by the average score.\n");

printf("\t 3. Select no passed record.\n");

printf("\tOther. Return the high level menu.\n\n");

}

void showStatistic(struct record *r ,long size,char classID[],int term) {

int total;

float ave;

long i;

system("cls");

showProgInform();

printf("All records for class: %s,term: %d; total record nubmer: %ld\n",classID,term,size);

printf("********************************************************\n");

for(i=0;isize;i++) {

total = r[i].chinese+r[i].english +r[i].math ;

ave = (float)total/3;

printf(" %s: (CHI)%d (MAT)%d (ENG)%d (Total)%d (Ave)%.2f\r\n",r[i].name,r[i].chinese,r[i].math,r[i].english,total,ave);

}

printf("********************************************************\n\n");

printf("Press Enter to return Select submenu\n");

getchar();

}

void sortSelectByAve(struct record * r,long size) {

FILE *fp;

struct record temp;

float outerAve ,innerAve;

int total;

long i,j;

system("cls");

showProgInform();

printf("\nSorted the records by average score\n");

for(i=0;isize;i++) {

outerAve = (float)(r[i].chinese+r[i].math+r[i].english)/3;

for(j=i+1;jsize;j++) {

innerAve = (float)(r[j].chinese+r[j].math+r[j].english)/3;

if(innerAve outerAve) {

strcpy(temp.name,r[j].name);

temp.chinese = r[j].chinese;

temp.math = r[j].math ;

temp.english = r[j].english ;

strcpy(r[j].name,r[i].name);

r[j].chinese = r[i].chinese ;

r[j].math = r[i].math ;

r[j].english = r[i].english ;

strcpy(r[i].name,temp.name);

r[i].chinese = temp.chinese ;

r[i].math = temp.math ;

r[i].english = temp.english ;

}

}

}

printf("\nshow sorted records \n");

printf("********************************************\n");

for(i=0;isize;i++) {

total = r[i].chinese + r[i].math + r[i].english ;

innerAve = (float)total/3;

printf("%s: %d %d %d %d %f\n",r[i].name,r[i].chinese,r[i].math,r[i].english,total,innerAve);

}

printf("********************************************\n");

printf("write sorted records to \"sorted.txt\"\n");

if((fp = fopen("sorted.txt","w"))== NULL) {

printf("open sort.txt failed\n");

return;

}

for(i=0;isize;i++) {

total = r[i].chinese + r[i].math + r[i].english ;

innerAve = (float)total/3;

fprintf(fp,"(CLASS-TERM)%s-%d (NAME)%s: (CHI)%3d (MAT)%3d (ENG)%3d (TOTAL)%4d (AVERG)%.2f\r\n",r[i].classID,r[i].term,r[i].name,r[i].chinese,r[i].math,r[i].english,total,innerAve);

}

printf("write file sorted.txt finished\n");

fclose(fp);

printf("\nPress any key to return Select subMenu\n");

}

void noPass(struct record * r,int size) {

long i=0,j=0;

FILE * fp;

if((fp=fopen("no-pass.txt","w"))==NULL) {

printf("create no-pass.txt failed");

return;

}

system("cls");

showProgInform();

printf("Mention: The following operation will be all on the classId and term you input\n\n");

printf("\nShow student that one subject is no-pass\n");

printf("***********************************************\n");

for(i=0;isize;i++) {

if(r[i].chinese 60 || r[i].math60 || r[i].english 60) {

printf("%s-%d %s: ",r[i].classID,r[i].term,r[i].name);

fprintf(fp,"%s-%d %s: ",r[i].classID,r[i].term,r[i].name);

if(r[i].chinese 60 ) {

printf("(Chinese)%d ",r[i].chinese);

fprintf(fp,"(Chinese)%d ",r[i].chinese );

}

if(r[i].math 60) {

printf("(Math)%d ",r[i].math);

fprintf(fp,"(Math)%d ",r[i].math);

}

if(r[i].english 60) {

printf("(English)%d",r[i].english);

fprintf(fp,"(English)%d",r[i].english);

}

printf("\r\n");

fprintf(fp,"\r\n");

}

}

printf("***********************************************\n");

fclose(fp);

printf("Press Enter to return \"Select\" submenu\n");

}

void selectRecord() {

char classID[CLASSLEN];

int term;

FILE * fp;

long fsize=0,arraySize=0,thisSize=0,i=0,j=0;

struct record *allRcd,*thisClass;

system("cls");

showProgInform();

printf("Mention: The following operation will be all on the classId and term you input\n\n");

printf("Mention: please operate by the following instructions\n\n");

printf("Input ClassID: ");

scanf("%s",classID);

printf("Input term number: ");

scanf("%d",term);

if((fp=fopen("stu_score.rcd","r"))==NULL) {

printf("\nWarining: No record exists!\n");

return;

}

fseek(fp,0,SEEK_END);

fsize = ftell(fp);

arraySize = fsize/(sizeof(struct record));

allRcd = (struct record *)calloc(arraySize,sizeof(struct record));

rewind(fp);

fread(allRcd,sizeof(struct record),arraySize,fp);

printf("Press Enter to show the sub menu of Select menu\n");

for(i=0;iarraySize;i++) {

if(strcmp(classID,allRcd[i].classID)==0 term==allRcd[i].term) {

thisSize++;

}

}

if(thisSize==0) {

printf("\nWaring: No record for Class %s Term %d\n",classID,term);

fclose(fp);

free(allRcd);

return;

}

thisClass = (struct record *)calloc(thisSize,sizeof(struct record));

j=0;

for(i=0;iarraySize;i++) {

if(strcmp(classID,allRcd[i].classID)==0 term==allRcd[i].term ) {

strcpy(thisClass[j].classID,classID) ;

thisClass[j].term = term ;

strcpy(thisClass[j].name,allRcd[i].name);

thisClass[j].chinese = allRcd[i].chinese;

thisClass[j].math = allRcd[i].math ;

thisClass[j].english = allRcd[i].english ;

j++;

}

}

free(allRcd);

/////////////////////////////////////////////////////////////

getchar();

getchar();

while(1) {

system("cls");

showProgInform();

printf("Mention: The following operation will be all on the classId and term you input\n\n");

showSelectMenu(classID,term);

switch(getchar()) {

case '1':

getchar();

showStatistic(thisClass,thisSize,classID,term);

break;

case '2':

getchar();

sortSelectByAve(thisClass,thisSize);

getchar();

break;

case '3':

getchar();

noPass(thisClass,thisSize);

printf("0: Press 0 to return \"Select\" submenu\n");

if(getchar()=='0')

break;

default:

getchar();

return;

}

}

free(thisClass);

fclose(fp);

}

void go_on() {

printf("Press Enter to continue\n");

getchar();

}

void main() {

showProgInform();

while(1) {

showMenu();

switch(getchar()) {

case '1':

getchar();

inputRecord();

go_on();

break;

case '2':

getchar();

updateRecord();

getchar();

go_on();

break;

case '3':

getchar();

selectRecord();

getchar();

go_on();

break;

case '4':

getchar();

//exit(1);

return;

default:

getchar();

printf("Wrong Option! input again\n");

go_on();

break;

}

}

}

求救 学生成绩管理C程序

/*头文件*/

#include stdio.h

#includedos.h

#includestdlib.h /*其它说明*/

#includestring.h /*字符串函数*/

#includemem.h /*内存操作函数*/

#includectype.h /*字符操作函数*/

#includealloc.h /*动态地址分配函数*/

#define LEN sizeof(STUDENT)

typedef struct stu /*定义结构体数组用于缓存数据*/

{char num[6];

char name[5];

int score[3];

int sum;

float average;

int order;

struct stu *next;

}STUDENT;

/*函数原型*/

STUDENT *init(); /*初始化函数*/

int menu_select(); /*菜单函数*/

STUDENT *create(); /*创建链表*/

void print(STUDENT *head); /* 显示全部记录*/

void search(STUDENT *head); /*查找记录*/

STUDENT *delete(STUDENT *head); /*删除记录*/

STUDENT *sort(STUDENT *head); /*排序*/

STUDENT *insert(STUDENT *head,STUDENT *new); /*插入记录*/

void save(STUDENT *head); /*保存文件*/

STUDENT *load(); /*读文件*/

/*主函数界面*/

main()

{STUDENT *head,new;

head=init(); /*链表初始化,使head的值为NULL*/

for(;;) /*循环无限次*/

{switch(menu_select())

{

case 1:head=create();break;

case 2:print(head);break;

case 3:search(head);break;

case 4:head=delete(head);break;

case 5:head=sort(head);break;

case 6:head=insert(head,new);break; /*new表示返回地址*/

case 7:save(head);break;

case 8:head=load(); break;

case 9:exit(0); /*如菜单返回值为9则程序结束*/

}

}

}

/*初始化函数*/

STUDENT *init()

{

return NULL; /*返回空指针*/

}

/*菜单选择函数*/

menu_select()

{int n;

struct date d; /*定义时间结构体*/

getdate(d); /*读取系统日期并把它放到结构体d中*/

printf("\n按任一键进入主菜单...... \npress any key to enter the menu......"); /*按任一键进入主菜单*/

getch(); /*从键盘读取一个字符,但不显示于屏幕*/

clrscr(); /*清屏*/

printf("********************************************************************************\n");

printf("\t\t 欢迎 Welcome to\n");

printf("\n\t\t\t 使用学生管理系统1.0\n\n\t\t\t\t\t-----------景炎中学计算机组WJQ\n");

printf("*************************************MENU***************************************\n");

printf("\t\t\t1. 输入学生成绩记录 Enter the record\n"); /*输入学生成绩记录*/

printf("\t\t\t2. 显示 Print the record\n"); /*显示*/

printf("\t\t\t3. 寻找 Search record on name\n"); /*寻找*/

printf("\t\t\t4. 删除 Delete a record\n"); /*删除*/

printf("\t\t\t5. 排序 Sort to make new a file\n"); /*排序*/

printf("\t\t\t6. 插入 Insert record to list\n"); /*插入*/

printf("\t\t\t7. 保存 Save the file\n"); /*保存*/

printf("\t\t\t8. 读取 Load the file\n"); /*读取*/

printf("\t\t\t9. 退出 Quit\n"); /*退出*/

printf("\n\t\t 制作吴俊遒WJQ Made by Wu Junqiu.\n");

printf("********************************************************************************\n");

printf("\t\t\t\t当前系统日期:%d\\%d\\%d\n",d.da_year,d.da_mon,d.da_day); /*显示当前系统日期*/

do{

printf("\n\t\t\t输入你的选择Enter your choice(1~9):");

scanf("%d",n);

}while(n1||n9); /*如果选择项不在1~9之间则重输*/

return(n); /*返回选择项，主函数根据该数调用相应的函数*/

}

/*输入函数*/

STUDENT *create()

{int i,s;

STUDENT *head=NULL,*p; /* 定义函数.此函数带回一个指向链表头的指针*/

clrscr();

for(;;)

{p=(STUDENT *)malloc(LEN); /*开辟一个新的单元*/

if(!p) /*如果指针p为空*/

{printf("\n输出内存溢出. Out of memory."); /*输出内存溢出*/

return (head); /*返回头指针,下同*/

}

printf("输入学号Enter the num(0:list end):");

scanf("%s",p-num);

if(p-num[0]=='0') break; /*如果学号首字符为0则结束输入*/

printf("输入名字Enter the name:");

scanf("%s",p-name);

printf("请输入3门成绩Please enter the %d scores\n",3); /*提示开始输入成绩*/

s=0; /*计算每个学生的总分，初值为0*/

for(i=0;i3;i++) /*3门课程循环3次*/

{

do{

printf("成绩score%d:",i+1);

scanf("%d",p-score[i]);

if(p-score[i]0 || p-score[i]100) /*确保成绩在0~100之间*/

printf("数据错误,请重新输入 Data error,please enter again.\n");

}while(p-score[i]0 || p-score[i]100);

s=s+p-score[i]; /*累加各门成绩*/

}

p-sum=s; /*将总分保存*/

p-average=(float)s/3; /*先用强制类型转换将s转换成float型,再求平均值*/

p-order=0; /*未排序前此值为0*/

p-next=head; /*将头结点做为新输入结点的后继结点*/

head=p; /*新输入结点为新的头结点*/

}

return(head);

}

/* 显示全部记录函数*/

void print(STUDENT *head)

{int i=0; /* 统计记录条数*/

STUDENT *p; /*移动指针*/

clrscr();

p=head; /*初值为头指针*/

printf("\n************************************STUDENT************************************\n");

printf("-------------------------------------------------------------------------------\n");

printf("| Rec | Num | Name | Sc1 | Sc2 | Sc3 | Sum | Ave | Order |\n");

printf("-------------------------------------------------------------------------------\n");

while(p!=NULL)

{

i++;

printf("| %3d | %4s | %-4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",

i, p-num,p-name,p-score[0],p-score[1],p-score[2],p-sum,p-average,p-order);

p=p-next;

}

printf("-------------------------------------------------------------------------------\n");

printf("**************************************END**************************************\n");

}

/*查找记录函数*/

void search(STUDENT *head)

{STUDENT *p; /* 移动指针*/

char s[5]; /*存放姓名用的字符数组*/

clrscr();

printf("请输入个姓名来查找. Please enter name for searching.\n");

scanf("%s",s);

p=head; /*将头指针赋给p*/

while(strcmp(p-name,s) p != NULL) /*当记录的姓名不是要找的，或指针不为空时*/

p=p-next; /*移动指针，指向下一结点*/

if(p!=NULL) /*如果指针不为空*/

{printf("\n*************************************FOUND************************************\n");

printf("-------------------------------------------------------------------------------\n");

printf("| Num | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n");

printf("-------------------------------------------------------------------------------\n");

printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",

p-num,p-name,p-score[0],p-score[1],p-score[2],p-sum,p-average,p-order);

printf("-------------------------------------------------------------------------------\n");

printf("***************************************END**************************************\n");

}

else

printf("\n没有该学生 There is no num %s student on the list.\n",s); /*显示没有该学生*/

}

/*删除记录函数*/

STUDENT *delete(STUDENT *head)

{int n;

STUDENT *p1,*p2; /*p1为查找到要删除的结点指针，p2为其前驱指针*/

char c,s[6]; /*s[6]用来存放学号,c用来输入字母*/

clrscr();

printf("请输入要删除的学号 Please enter the deleted num: ");

scanf("%s",s);

p1=p2=head; /*给p1和p2赋初值头指针*/

while(strcmp(p1-num,s) p1 != NULL) /*当记录的学号不是要找的，或指针不为空时*/

{p2=p1; /*将p1指针值赋给p2作为p1的前驱指针*/

p1=p1-next; /*将p1指针指向下一条记录*/

}

if(strcmp(p1-num,s)==0) /*学号找到了*/

{printf("**************************************FOUND************************************\n");

printf("-------------------------------------------------------------------------------\n");

printf("| Num | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n");

printf("-------------------------------------------------------------------------------\n");

printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",

p1-num,p1-name,p1-score[0],p1-score[1],p1-score[2],p1-sum,p1-average,p1-order);

printf("-------------------------------------------------------------------------------\n");

printf("***************************************END**************************************\n");

printf("\n是否要删除,输入Y删除,N则退出\nAre you sure to delete the student Y/N ?"); /*提示是否要删除,输入Y删除,N则退出*/

for(;;)

{scanf("%c",c);

if(c=='n'||c=='N') break; /*如果不删除,则跳出本循环*/

if(c=='y'||c=='Y')

{

if(p1==head) /*若p1==head，说明被删结点是首结点*/

head=p1-next; /*把第二个结点地址赋予head*/

else

p2-next=p1-next; /*否则将一下结点地址赋给前一结点地址*/

n=n-1;

printf("\n学号为(Num): %s 学生以被删除(student have been deleted.)\n",s);

printf("别忘了保存. Don't forget to save.\n");break; /*删除后就跳出循环*/

}

}

}

else

printf("\n没有这个学生在表上\nThere is no num %s student on the list.\n",s); /*找不到该结点*/

return(head);

}

/*排序函数*/

STUDENT *sort(STUDENT *head)

{int i=0; /*保存名次*/

STUDENT *p1,*p2,*t,*temp; /*定义临时指针*/

temp=head-next; /*将原表的头指针所指的下一个结点作头指针*/

head-next=NULL; /*第一个结点为新表的头结点*/

while(temp!=NULL) /*当原表不为空时，进行排序*/

{

t=temp; /*取原表的头结点*/

temp=temp-next; /*原表头结点指针后移*/

p1=head; /*设定移动指针p1，从头指针开始*/

p2=head; /*设定移动指针p2做为p1的前驱，初值为头指针*/

while(t-averagep1-averagep1!=NULL) /*作成绩平均分比较*/

{

p2=p1; /*待排序点值小，则新表指针后移*/

p1=p1-next;

}

if(p1==p2) /*p1==p2，说明待排序点值大，应排在首位*/

{

t-next=p1; /*待排序点的后继为p*/

head=t; /*新头结点为待排序点*/

}

else /*待排序点应插入在中间某个位置p2和p1之间，如p为空则是尾部*/

{

t-next=p1; /*t的后继是p1*/

p2-next=t; /*p2的后继是t*/

}

}

p1=head; /*已排好序的头指针赋给p1，准备填写名次*/

while(p1!=NULL) /*当p1不为空时，进行下列操作*/

{

i++; /*结点序号*/

p1-order=i; /*将结点序号赋值给名次*/

p1=p1-next; /*指针后移*/

}

printf("排序成功 Sorting is sucessful.\n"); /*排序成功*/

return (head);

}

/*插入记录函数*/

STUDENT *insert(STUDENT *head,STUDENT *new)

{STUDENT *p0,*p1,*p2;

int n,sum1,i;

p1=head; /*使p1指向第一个结点*/

p0=new; /*p0指向要插入的结点*/

printf("\nPlease enter a new record.\n"); /*提示输入记录信息*/

printf("输入学号Enter the num:");

scanf("%s",new-num);

printf("输入名字Enter the name:");

scanf("%s",new-name);

printf("Please enter the %d scores.\n",3);

sum1=0; /*保存新记录的总分，初值为0*/

for(i=0;i3;i++)

{

do{

printf("成绩score%d:",i+1);

scanf("%d",new-score[i]);

if(new-score[i]100||new-score[i]0)

printf("数据错误Data error,please enter again.\n");

}while(new-score[i]100||new-score[i]0);

sum1=sum1+new-score[i]; /*累加各门成绩*/

}

new-sum=sum1; /*将总分存入新记录中*/

new-average=(float)sum1/3;

new-order=0;

if(head==NULL) /*原来的链表是空表*/

{head=p0;p0-next=NULL;} /*使p0指向的结点作为头结点*/

else

{while((p0-averagep1-average)(p1-next!=NULL))

{p2=p1; /*使p2指向刚才p1指向的结点*/

p1=p1-next; /*p1后移一个结点*/

}

if(p0-average=p1-average)

{if(head==p1)head=p0; /*插到原来第一个结点之前*/

else p2-next=p0; /*插到p2指向的结点之后*/

p0-next=p1;}

else

{p1-next=p0;p0-next=NULL;} /*插到最后的结点之后*/

}

n=n+1; /*结点数加1*/

head=sort(head); /*调用排序的函数,将学生成绩重新排序*/

printf("\n学生Student %s 已被更新have been inserted.\n",new-name);

printf("不要忘了保存Don't forget to save the new file.\n");

return(head);

}

/*保存数据到文件函数*/

void save(STUDENT *head)

{FILE *fp; /*定义指向文件的指针*/

STUDENT *p; /* 定义移动指针*/

char outfile[10];

printf("输出文件例如:c:\\score Enter outfile name,for example c:\\score\n");

scanf("%s",outfile);

if((fp=fopen(outfile,"w"))==NULL) /*为输出打开一个二进制文件,为只写方式*/

{

printf("打不开文件Cannot open the file\n");

return; /*若打不开则返回菜单*/

}

printf("\n保存中...Saving the file......\n");

p=head; /*移动指针从头指针开始*/

while(p!=NULL) /*如p不为空*/

{

fwrite(p,LEN,1,fp); /*写入一条记录*/

p=p-next; /*指针后移*/

}

fclose(fp); /*关闭文件*/

printf("保存成功....Save the file successfully!\n");

}

/* 从文件读数据函数*/

STUDENT *load()

{STUDENT *p1,*p2,*head=NULL; /*定义记录指针变量*/

FILE *fp; /* 定义指向文件的指针*/

char infile[10];

printf("倒入文件例如:c:\\score Enter infile name,for example c:\\score\n");

scanf("%s",infile);

if((fp=fopen(infile,"r"))==NULL) /*打开一个二进制文件，为只读方式*/

{

printf("打不开文件Can not open the file.\n");

return(head);

}

printf("\n寻找文件...Loading the file!\n");

p1=(STUDENT *)malloc(LEN); /*开辟一个新单元*/

if(!p1)

{

printf("内存溢出!Out of memory!\n");

return(head);

}

head=p1; /*申请到空间，将其作为头指针*/

while(!feof(fp)) /*循环读数据直到文件尾结束*/

{

if(fread(p1,LEN,1,fp)!=1) break; /*如果没读到数据，跳出循环*/

p1-next=(STUDENT *)malloc(LEN); /*为下一个结点开辟空间*/

if(!p1-next)

{

printf("Out of memory!\n");

return (head);

}

p2=p1; /*使p2指向刚才p1指向的结点*/

p1=p1-next; /*指针后移，新读入数据链到当前表尾*/

}

p2-next=NULL; /*最后一个结点的后继指针为空*/

fclose(fp);

printf("\n你成功的从文件中读取了数据!\nYou have success to read data from the file!\n");

return (head);

}

c语言学生管理系统

C 语言学生成绩管理系统

#includestdio.h

#includemalloc.h

#includeconio.h

#includestring.h

typedef struct STUDENT

{

char studentNumber[20];/*学生学号*/

char studentName[20];/*学生姓名*/

char className[20];/*班级名称*/

float mark1;/*第1门成绩*/

float mark2;/*第2门成绩*/

float mark3;/*第3门成绩*/

struct STUDENT *next;

}STUDENT;

STUDENT *headLink; /*链表表头指针*/

/*函数声明*/

void ReadInfoFormFile();

void Menu();

void CreateHeadLink();

STUDENT *MallocNode();

void GetInformation(STUDENT *t);

void OutputInformation();

void DesplayInfoBystudentName();

void DesplayInfoBystudentNumber();

void DesplayOneNode(STUDENT *t);

void InsertOneNode(STUDENT *t);

void DeleteNodeBystudentNumber();

void ChangeMarkByName();

void ChangeMarkByNumber();

void SaveLinkToFile();

void paixu();

void DesplayMarkSegment();

int choose;/*用于接受用户的选择*/

/*主函数*/

main()

{

system("color 2a");

printf("\n\t\t欢迎进入***学院***班学生成绩管理系统\n\n\n");

printf("\t\t\t\tO(∩_∩)O\n\n\n\n");

printf("\t\t\t^_^\t\t\t^_^\n\n");

printf("\n\t\t 注意：请按照要求输入相应信息，谢谢！\n\n\n\n\n");

printf("\t\t\t\t\t\t\t\t制作人：***\n\n\n");

printf("\t\t\t 按任意键进入…………");

getch();

system("cls");

CreateHeadLink();

ReadInfoFormFile();

Menu();

}

/*从文件中读学生信息到链表中*/

void ReadInfoFormFile(void)

{

FILE *fp;

STUDENT *p;

fp=fopen("student.txt","r");

if(!fp)

{

printf("\n");

return;

}

p=MallocNode();

while(fscanf(fp,"%s%s%s%f%f%f",p-studentNumber,p-studentName,p-className,(p-mark1),(p-mark2),(p-mark3))0)

{

InsertOneNode(p);

p=MallocNode();

}

fclose(fp);

}

/*显示菜单，根据用户的输入完成相应的功能*/

void Menu(void)

{

STUDENT *p;

printf("\t\t (^o^)欢迎使用学生成绩管理系统(^o^)\n\n");

printf("\t ※--------------------请选择相应功能---------------------※\n\n");

printf("\t 1: 显示所有学生的信息 |");

printf(" \t 2: 按姓名查询 |\n\n");

printf("\t 3: 按学号查询 |");

printf(" \t\t 4: 增加学生 |\n\n");

printf("\t 5: 删除学生 |");

printf(" \t\t 6: 按姓名修改学生成绩 |\n\n");

printf("\t 7: 按学号修改学生成绩 |");

printf(" \t 8: 保存所有学生信息 |\n\n");

printf("\t 9: 按成绩输出学生信息 |");

printf("\t 10: 显示不及格及优秀学生 |\n\n");

printf("\t 11: 返回主菜单 |");

printf("\t\t 12: 退出 |\n\n");

printf("\t ※----------------------O(∩_∩)O------------------------※\n\n");

printf("\t 请输入对应数字:");

scanf("%d",choose);/*取得用户的选择*/

switch(choose)

{

case 1:system("cls");

OutputInformation();/*显示所有学生的信息*/

break;

case 2: system("cls");

DesplayInfoBystudentName();

break;

case 3: system("cls");

DesplayInfoBystudentNumber();/*根据用户输入的学号显示该学生的信息*/

break;

case 4: system("cls");

p=MallocNode();/*先申请一个新结点*/

GetInformation(p);/*要求用户输入信息到新结点中*/

InsertOneNode(p);/*将新结点加到链表中*/

break;

case 5: system("cls");

DeleteNodeBystudentNumber();/*根据用户输入的学号删除该学生*/

break;

case 6: system("cls");

ChangeMarkByName();/*根据用户输入的姓名修改学生成绩*/

break;

case 7: system("cls");

ChangeMarkByNumber();/*根据用户输入的学号修改学生成绩*/

break;

case 8: system("cls");

SaveLinkToFile();/*保存数据*/

break;

case 9: system("cls");

paixu();break;

case 10: system("cls");

DesplayMarkSegment();break;

case 11: system("cls");

break;

case 12: system("cls");

SaveLinkToFile();/*保存数据后再退出*/

free(headLink);

exit(1);

break;

default: system("cls"); break;

}

Menu();/*递归调用*/

}

/*建立链表表头*/

void CreateHeadLink(void)

{

STUDENT *p;

p=(STUDENT*)malloc(sizeof(STUDENT));

headLink=p;

p-next=NULL;

}

/*申请一个新结点，并将其初始化*/

STUDENT *MallocNode(void)

{

STUDENT *p;

int i;

p=(STUDENT*)malloc(sizeof(STUDENT));

if(p==NULL)

return NULL;

for(i=0;i10;i++)

p-studentNumber='\0';

for(i=0;i20;i++)

p-studentName='\0';

for(i=0;i20;i++)

p-className='\0';

p-mark1=0.0;

p-mark2=0.0;

p-mark3=0.0;

p-next=NULL;

return p;

}

/*取得用户输入的学生信息*/

void GetInformation(STUDENT *t)

{

printf("请输入学生学号：");

scanf("%s",t-studentNumber);

printf("请输入学生姓名：");

scanf("%s",t-studentName);

printf("请输入该生所在班级：");

scanf("%s",t-className);

printf("请输入第1门成绩：");

scanf("%f",(t-mark1));

printf("请输入第2门成绩：");

scanf("%f",(t-mark2));

printf("请输入第3门成绩：");

scanf("%f",(t-mark3));

}

/*在链表的结尾处增加一个结点*/

void InsertOneNode(STUDENT *t)

{

STUDENT *p;

p=headLink;

while(p-next)

{

p=p-next;

}

p-next=t;

}

/*根据用户输入的学生姓名显示该学生的信息*/

void DesplayInfoBystudentName(void)

{

STUDENT *p;

char studentName[20];

char flag=0;

p=headLink-next;

printf("请输入学生姓名：");

scanf("%s",studentName);

while(p)

{

if(strcmp(p-studentName,studentName)==0)

{system("cls");

printf("\t学号\t姓名\t班级\t成绩1\t成绩2\t成绩3\t总成绩\t平均成绩\n");

DesplayOneNode(p);

flag=1;

break;

}

p=p-next;

}

if(!flag) {system("cls");

printf("\t 对不起，不存在姓名为 %s 的学生\n",studentName);}

}

/*根据用户输入的学号显示该学生的信息*/

void DesplayInfoBystudentNumber(void)

{

STUDENT *p;

char studentNumber[20];

char flag=0;

p=headLink-next;

printf("请输入学生学号：");

scanf("%s",studentNumber);

while(p)

{

if(strcmp(p-studentNumber,studentNumber)==0)

{ system("cls");

printf("\t学号\t姓名\t班级\t成绩1\t成绩2\t成绩3\t总成绩\t平均成绩\n");

DesplayOneNode(p);

flag=1;

break;

}

p=p-next;

}

if(!flag) {system("cls");

printf("\t 对不起，不存在学号为 %s 的学生\n",studentNumber);

}}

/*输出一个结点的信息*/

void DesplayOneNode(STUDENT *t)

{

printf("\t%s\t",t-studentNumber);

printf("%s\t",t-studentName);

printf("%s\t",t-className);

printf("%.2f\t",t-mark1);

printf("%.2f\t",t-mark2);

printf("%.2f\t",t-mark3);

printf("%.2f\t",t-mark1+t-mark2+t-mark3);

printf("%.2f\t\n",(t-mark1+t-mark2+t-mark3)/3);

}

/*根据用户输入的学号删除该学生*/

void DeleteNodeBystudentNumber(void)

{

char studentNumber[10];

STUDENT *p,*q;

char flag=0;

printf("请输入要删除的学生学号：");

scanf("%s",studentNumber);

p=headLink;

q=headLink-next;

while(q)

{

if(strcmp(q-studentNumber,studentNumber)==0)

{

p-next=q-next;

free(q);

flag=1;

break;

}

p=p-next;

q=q-next;

}

if(!flag)

{ system("cls");

printf("\t 不存在该学号的学生\n");

return;

}

system("cls");

printf("\t 成功删除\n");

}

/*显示所有学生的信息*/

void OutputInformation(void)

{

STUDENT *p;

p=headLink-next;

if(p==NULL)

{

printf("\t 现在没有学生信息，请先输入学生信息\n\n");

return;

}

printf("\t学号\t姓名\t班级\t成绩1\t成绩2\t成绩3\t总成绩\t平均成绩\n");

while(p)

{

DesplayOneNode(p);

p=p-next;

}

}

/*根据输入的姓名修改成绩*/

void ChangeMarkByName(void)

{

STUDENT *p;

char studentName[20];

char flag=0;

float mark1,mark2,mark3;

p=headLink-next;

printf("请输入学生姓名：");

scanf("%s",studentName);

while(p)

{

if(strcmp(p-studentName,studentName)==0)

{

printf("请输入新的第1门成绩：\n");

scanf("%f",mark1);

printf("请输入新的第2门成绩：\n");

scanf("%f",mark2);

printf("请输入新的第3门成绩：\n");

scanf("%f",mark3);

p-mark1=mark1;

p-mark2=mark2;

p-mark3=mark3;

flag=1;

printf("修改成功\n");

break;

}

p=p-next;

}

if(!flag) {system("cls");

printf("\t 对不起，不存在姓名为 %s 的学生\n",studentName);

} }

/*根据输入的姓名修改成绩*/

void ChangeMarkByNumber(void)

{

STUDENT *p;

char studentNumber[20];

char flag=0;

float mark1,mark2,mark3;

p=headLink-next;

printf("请输入学生学号：");

scanf("%s",studentNumber);

while(p)

{

if(strcmp(p-studentNumber,studentNumber)==0)

{

printf("请输入新的第1门成绩：\n");

scanf("%f",mark1);

printf("请输入新的第2门成绩：\n");

scanf("%f",mark2);

printf("请输入新的第3门成绩：\n");

scanf("%f",mark3);

p-mark1=mark1;

p-mark2=mark2;

p-mark3=mark3;

flag=1;

printf("修改成功\n");

break;

}

p=p-next;

}

if(!flag){system("cls");

printf("\t 对不起，不存在学号为 %s 的学生\n",studentNumber);

}}

/*保存链表数据到文件中*/

void SaveLinkToFile(void)

{

STUDENT *p;

FILE *fp;

p=headLink-next;

if(p==NULL)

{

printf("\t 现在没有学生信息，请先输入学生信息\n\n");

return;

}

fp=fopen("student.txt","w+");

if(!fp)

{

printf("文件不存在\n");

return;

}

while(p)

{

fprintf(fp,"%s %s %s %f %f %f\n",p-studentNumber,p-studentName,p-className,p-mark1,p-mark2,p-mark3);

p=p-next;

}

fclose(fp);

}

/*显示优秀和不及格学生成绩*/

void DesplayMarkSegment(void)

{

STUDENT *p;

int count=0;

p=headLink-next;

printf("\t60分以下(不及格)的学生成绩如下：\n");

printf("\t学号\t姓名\t班级\t成绩1\t成绩2\t成绩3\t总成绩\t平均成绩\n\n");

while(p)

{

if((6((int)(p-mark1/10)))||(6((int)(p-mark2/10)))||(6((int)(p-mark3/10))))/*只要有一科不及格就认为该生不及格*/

{

count++;

DesplayOneNode(p);

}

p=p-next;

}

printf("\t不及格的学生一共有%d人\n",count);

p=headLink-next;

printf("\t成绩优秀的学生成绩如下：\n");

printf("\t学号\t姓名\t班级\t成绩1\t成绩2\t成绩3\t总成绩\t平均成绩\n\n");

count=0;

while(p)

{

if((8=((int)(p-mark1/10)))(8=((int)(p-mark2/10)))(8=((int)(p-mark3/10))))

{

count++;

DesplayOneNode(p);

}

p=p-next;

}

printf("\t成绩优秀的学生一共有%d人\n",count);

}

/*按总成绩排序*/

void paixu(void)

{

STUDENT exchange,*r,*p,*q;

r=headLink-next;

if(r==NULL)

{

printf("\t 现在还没学生信息,请先输入学生信息\n");

return;

}

while(r)/*两层while循环实现排序*/

{

p=r;

q=r-next;

while(q)

{

if((q-mark1+q-mark2+q-mark3)(p-mark1+p-mark2+p-mark3))

{

strcpy(exchange.studentNumber,q-studentNumber);/*先复制q结点信息到exchange*/

strcpy(exchange.studentName,q-studentName);

strcpy(exchange.className,q-className);

exchange.mark1=q-mark1;

exchange.mark2=q-mark2;

exchange.mark3=q-mark3;

strcpy(q-studentNumber,p-studentNumber);/*再复制p结点信息到q*/

strcpy(q-studentName,p-studentName);

strcpy(q-className,p-className);

q-mark1=p-mark1;

q-mark2=p-mark3;

q-mark3=p-mark3;

strcpy(p-studentNumber,exchange.studentNumber);/*最后复制exchange结点信息到p*/

strcpy(p-studentName,exchange.studentName);

strcpy(p-className,exchange.className);

p-mark1=exchange.mark1;

p-mark2=exchange.mark2;

p-mark3=exchange.mark3;

}

q=q-next;

}

r=r-next;

}

OutputInformation();

}

如何建立“学生管理”数据库，并在“学生管理”数据库中分别建立“学生基本情况表”求高手教一下

USE [master]

GO

CREATE DATABASE StudentManage ON PRIMARY

( NAME = N'StudentManage', FILENAME = N'D:\StudentManage.mdf' , SIZE = 3072KB , MAXSIZE = UNLIMITED, FILEGROWTH = 1024KB )

LOG ON

( NAME = N'StudentManage_log', FILENAME = N'D:\StudentManage_log.ldf' , SIZE = 1024KB , MAXSIZE = 2048GB , FILEGROWTH = 10%)

GO

/*学生管理数据库（StudentManage）创建完成，下面创建学生表（Student）：*/

USE [Jinlong]

GO

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

SET ANSI_PADDING ON

GO

CREATE TABLE [dbo].[Student](

[学号C9] [char](7) NOT NULL,

[姓名C10] [char](6) NULL,

[性别C2] [char](2) NULL,

CONSTRAINT [PK_Student] PRIMARY KEY CLUSTERED

(

[SID] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

) ON [PRIMARY]

GO

SET ANSI_PADDING OFF

GO