C++对txt文本进行读写操作

输入输出，是每个程序员的基本功，尤其是对文本的输入和输出。最近，自己在这方面做了一些总结，不是很全面，希望在以后学习和工作的过程中慢慢补充，积累点点滴滴。P.S. 今天天气不错，雾霾散了，天空晴朗，惠风和畅，心情不错。

一、写操作

 

// set.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "iostream"
#include "string"
#include "fstream"

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
    const string data = (string)"hello"+"+"+"world";
    ofstream out(data,ofstream::app);
    out << 3 <<endl;
    out.close();
    return 0;
}

 

 

二、读操作

 

// set.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "iostream"
#include "string"
#include "fstream"
#include "vector"
#include "sstream"

using namespace std;

struct personalinfo{
    string name;
    vector<string> phones;
};

int _tmain(int argc, _TCHAR* argv[])
{
    const string data = "C:\\Users\\helei\\Documents\\Visual Studio 2010\\Projects\\set\\Release\\hello+world";
    ifstream out(data,ofstream::app);
    string line,word;
    vector<personalinfo> people;
    while (getline(out,line)){
        personalinfo info;
        istringstream record(line);
        record >> info.name;
        while (record >> word)
            info.phones.push_back(word);
        people.push_back(info);
    }

    cout << people[0].name <<" "<< people[0].phones[0] <<" "<< people[0].phones[1] << endl;
    cout << people[1].name <<" "<< people[1].phones[0] << endl;
    cout << people[2].name <<" "<< people[2].phones[0] <<" "<< people[2].phones[1] <<" "<< people[2].phones[2] << endl;

    out.close();
    return 0;
}