c语言编程学生管理系统的代码,C语言学生管理系统源代码.doc

C语言学生成绩管理系统源代码，保证能用……

#include "malloc.h"

#include "stdio.h"

#include "stdlib.h"

#include "string.h"

char filename[30];

int n=0,d;

FILE *fp;

typedef struct student

{

int num;

char name[10];

int yuwen;

int shuxue;

int yingyu;

int count;

float aver;

struct student *next;

} aaa;

typedef struct stu

{

int num;

char name[10];

int yuwen,shuxue,yingyu;

int count;

float aver;

} aaaa;

aaa *head;

/*浏览*/

void liulan(aaa *head)

{

aaa *p;

if(head==NULL)

printf("\n没有任何学生资料!\n");

else

{

printf("\t\t\t考试成绩管理系统\n");

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

printf("|学号\t|姓名\t|语文\t|数学\t|英语\t|总分\t|平均分|\n");

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

p=head->next;

do{

printf("|%d\t|%s\t|%d\t|%d\t|%d\t|%d\t|%.1f\t|\n",p->num,p->name,p->yuwen,p->shuxue,p->yingyu,p->yuwen+p->shuxue+p->yingyu,p->count/3.0);

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

p=p->next;

}while(p!=NULL);

}

}

/*读取*/

aaa *duqu ()

{

aaa *s,*head,*p,*q;

n=0;

if((fp=fopen(filename,"rb"))==NULL)

{

printf("不能读取文件!\n");

return NULL;

}

head=malloc(sizeof(aaa));

if(head==NULL)

{

printf("内存空间不足，文件读取失败！\n");

return NULL;

}

head->next=NULL;

p=head;

q=malloc(sizeof(aaa));

if(!feof(fp))

{

fread(q,sizeof(aaaa),1,fp);

q->next=NULL;

}

while(!feof(fp))

{

s=malloc(sizeof(aaa));

fread(s,sizeof(aaaa),1,fp);

s->next=NULL;

p->next=q;

p=q;

q=s;

n++;

}

return head;

}

/*输入函数*/

aaa *shuru (aaa *head)

{

aaa *q,*p,*s;

aaa newstd;

n=0;

q=head;

do{

q=head;

s=malloc(sizeof(aaa));

if(s==NULL)

{

printf("内存不足，添加学生成绩失败!\07\n");

break;

}

printf("请输入学号(输入0退出):");

scanf("%d",&newstd.num);

if(newstd.num==0)

break;

if(newstd.num<0)

{

printf("输入学号有误，请重新输入\n");

break;

}

p=head->next;

while(p!=NULL)

{

if(p->num==newstd.num)

{

printf("输入学号重复，请重新输入！\n");

break;

}

p=p->next;

q=q->next;

}

if(p==NULL)

{