include
char name[60]; char ID[7]; int score; };
int dq(struct student st[]); void xianshi();
void bc(struct student st[]); void add(); void select(); void zz();
void chazhao(); void xhcz(); void xmcz(); void del(); void xmsc(); void xhsc(); void tj(); void bjg(); void xg(); void xhxg(); void xmxg(); void bca(); void fh();
struct student st[300]; int Number=0; void main() {
int choose=0; FILE *fp=NULL; char yesorno;
if((fp=fopen(\ {
printf(\提示：文件不存在，是否要创建一个?(y/n)\\n\ scanf(\
if(yesorno=='y'||yesorno=='Y') {
fp=fopen(\ fclose(fp); } else
exit(0); } else {
Number=dq(st); }
system(\ while(true) {
xianshi();
printf(\请选择：\ scanf(\ system(\ switch(choose) {
case 0: exit(0);fh();break; case 1: add();fh();break; case 2: select();fh();break; case 3: chazhao();fh();break; case 4: del();fh();break; case 5: tj();fh();break; case 6: bjg();fh();break; case 7: xg();fh();break; case 8:zz();fh();break; case 9:bca();break; default:break; }
fflush(stdin); getchar(); system(\ } }
void bca() {
printf(\程序在运行时已自动保存.....\\n\ }
void fh() {
printf(\按Enter键返回主菜单\\n\ }
void xg() {
int way=0;
printf(\请选择修改查找方式\\n\ printf(\按姓名查找修改\\n\ printf(\按学号查找修改\\n\ scanf(\ switch(way) {
case 1: xmxg();break;
case 2: xhxg();break;
default: printf(\输入有误，结束!\\n\ } }
void xmxg() {
FILE *fp=NULL; char name[60]; int i=0;
int changeIndex=0; int index=0;
printf(\请输入要修改的学生姓名：\ scanf(\
for (i=0;i if (strcmp(name,st[i].name)) { changeIndex=i; } break; } printf(\姓名\\t学号\\t成绩\\n\ printf(\ndex].score); printf(\请重新输入该学生信息\ printf(\姓名：\ scanf(\ printf(\学号：\ scanf(\ printf(\成绩：\ scanf(\ fp=fopen(\ for (i=0;i fwrite(&st[i],sizeof(struct student),1,fp); } fclose(fp); } void xhxg() { FILE *fp=NULL; char id[60]; int i=0; int changeIndex=0; int index=0; printf(\请输入要修改的学生学号：\ scanf(\ for (i=0;i if (strcmp(id,st[i].ID)) { changeIndex=i; } break; } printf(\姓名\\t学号\\t成绩\\n\ printf(\ndex].score); printf(\请重新输入该学生信息\ printf(\姓名：\ scanf(\ printf(\学号：\ scanf(\ printf(\成绩：\ scanf(\ fp=fopen(\ for (i=0;i fwrite(&st[i],sizeof(struct student),1,fp); } fclose(fp); printf(\修改成功\\n\ } void bjg() { int i=0; printf(\以下是不及格:\\n\ printf(\姓名\\t学号\\t成绩\\n\ for (i=0;i if (st[i].score <60) { printf(\ } } } void tj() { int i=0; double sum=0.0; for(i=0;i sum+=st[i].score; } printf(\全班总分为：%f\\n\ printf(\平均分为：%f\\n\ } void del() { int n=0; printf(\按姓名删除\\n\ printf(\按学号删除\\n\ scanf(\ switch(n) { case 1: xmsc();break; case 2: xhsc();break; } } void xmsc() { FILE *fp=NULL; char name[60]; int i=0; int j=0; printf(\请输入要删除的学生姓名：\ scanf(\ for(i=0;i if(strcmp(name,st[i].name)==0) { for (j=i;j st[j]=st[j+1]; } Number--; } } fp=fopen(\ for (i=0;i fwrite(&st[i],sizeof(struct student),1,fp); } fclose(fp);