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==newst...
