摘要：4 `#include<stdio.h> int main(){ FILE *fp; char ch; int count=0; fp=fopen("d:\data4.txt","r"); if(fp==NULL){ printf("fail to open file\n"); return 0; 阅读全文

摘要：1 `#include<stdio.h> include<string.h> define N 3 typedef struct student{ int id; char name[20]; char subject[20]; double perf; double mid; double fin 阅读全文