文件读写

一、ofstream、ifstream

1、代码

#include "stdafx.h"#include<fstream>#include<iostream>#include<string>using namespace std;struct TYPE{int id;char name[10];int buff[10];};int main(){cout << "write 10 times" << endl;ofstream out("1.txt",ios::app);if (!out){cout << "open file err" << endl;return -1;}for (int num = 0; num < 10; num++){TYPE v;v.id = num;strcpy(v.name, "kira");for (int i = 0; i < 10; i++){v.buff[i] = i;}out << v.id << " ";out << v.name << " ";for (int i = 0; i < 9; i++){out << v.buff[i] << " ";}out << v.buff[9] << '\n';cout << v.id << " ";cout << v.name << " ";for (int i = 0; i < 10; i++){cout << v.buff[i] << " ";}cout << endl;}out.close();cout << "read from txt" << endl;ifstream in("1.txt");if (!in){cout << "open file err" << endl;return -1;}TYPE vv;while (in >> vv.id){in >> vv.name;for (int i = 0; i < 10; i++){in >> vv.buff[i];}cout << vv.id << " ";cout << vv.name << " ";for (int i = 0; i < 10; i++){cout << vv.buff[i] << " ";}cout << endl;}    return 0;}

2、结果

2.1 生成文件如下

2.2 屏幕显示如下