02 2019 档案

摘要：#include<stdio.h>#include<windows.h>#include<string.h>int main(void){ char name[32]; char password[32]; FILE*data; char name_tmp[32]; char password_tm 阅读全文

摘要：#include<stdio.h>#include<windows.h>int main(void){ FILE*data; data=fopen("C:\\teacher.txt","a");//"a"尾部追加一个“写”的功能 if(!data){ //！data等效于 data == NULL 阅读全文

摘要：#include <stdio.h>#include <windows.h>int main(void){ FILE *a; a=fopen("C:\\student.txt","r"); if(!a){ printf("文件错误！"); }else{ printf("文件打开成功！\n"); sy 阅读全文