请大神指教学生选课系统

Question

#include <stdio.h>

#include <stdlib.h>

#include <windows.h>

#include <string.h>

#define N 20

struct xk

{

int num;

char name[20];

char xz;

int zks;

int ks;

int syks;

int xf;

int kk;

}kc[N];

void lr()

{

FILE *fp;

int i,n;

fp=fopen("d://kcxx.txt","ab+");

if(fp==NULL){

printf("Can not open file\n");

exit(1);

}

printf("输入几门课程信息\n");

scanf("%d",&n);

for(i=0;i<n;i++)

{

printf("请输入课程编号\n");

scanf("%d",&kc[i].num);

printf("请输入课程名称\n");

gets(kc[i].name);

printf("请输入课程性质\n");

scanf("%c",&kc[i].xz);

printf("请输入课程总课时\n");

scanf("%d",&kc[i].zks);

printf("请输入课程授课课时\n");

scanf("%d",&kc[i].ks);

printf("请输入课程实验课时\n");

scanf("%d",&kc[i].syks);

printf("请输入课程学分\n");

scanf("%d",&kc[i].xf);

printf("请输入课程开课学期\n");

scanf("%d",&kc[i].kk);

fwrite(&kc[i],sizeof(struct xk),8,fp);

}

fclose(fp);

}

void ll()

{

FILE *fp;

int i;

fp=fopen("d://kcxx.txt","ab+");

if(fp==NULL){

printf("Can not open file\n");

exit(1);

}

for(i=0;i<N;i++){

fread(&kc[i],sizeof(struct xk),8,fp);

printf("%d\t%s\t%c\t%d\t%d\t%d\t%d\t%d\t",&kc[i].num,&kc[i].name,&kc[i].xz,&kc[i].zks,&kc[i].ks,&kc[i].syks,&kc[i].xf,&kc[i].kk);

}

fclose(fp);

}

void xfcx()

{

FILE *fp;

struct xk kc1[N];

int i,n;

fp=fopen("d://kcxx.txt","rb");

if(fp==NULL){

printf("Can not open file\n");

exit(1);

}

printf("输入学分\n");

scanf("%d",&i);

for(n=0;n<N;n++){

fread(&kc1[n],sizeof(struct xk),1,fp);

if(i==kc1[n].xf)

{

printf("%d\t%s\t%c\t%d\t%d\t%d\t%d\t%d\t",&kc[i].num,&kc[i].name,&kc[i].xz,&kc[i].zks,&kc[i].ks,&kc[i].syks,&kc[i].xf,&kc[i].kk);

}

}

void xfcx()

{

FILE *fp;

struct xk kc1[N];

int i,n;

fp=fopen("d://kcxx.txt","rb");

if(fp==NULL){

printf("Can not open file\n");

exit(1);

}

printf("输入学分\n");

scanf("%d",&i);

for(n=0;n<N;n++){

fread(&kc1[n],sizeof(struct xk),1,fp);

if(i==kc1[n].xf)

{

printf("%d\t%s\t%c\t%d\t%d\t%d\t%d\t%d\t",&kc[i].num,&kc[i].name,&kc[i].xz,&kc[i].zks,&kc[i].ks,&kc[i].syks,&kc[i].xf,&kc[i].kk);

}

}

void cx()

{

FILE *fp;

int i;

fp=fopen("d://kcxx.txt","ab+");

if(fp==NULL){

printf("Can not open file\n");

exit(1);

}

printf("1、学分查询，2、课程性质查询");

scanf("%d",&i);

switch(i)

{

case 1:xfcx();

break;

case 2:xzcx();

break;

default:printf("输入有误，重新输入。\n");

sleep(1000);

}

}

Answer 1

注视都没有，帮不了