STL文件读写操作

#include <iostream>

#include <fstream>

#include <string>

using namespace std;

int main()

{

//    ifstream input("./in.txt", ios::in | ios::binary);

//    ofstream output("./out.txt",ios::out|ios::binary);

    ifstream input("./in.txt", ios::in );

    ofstream output("./out.txt",ios::out);

    string line;

    while(std::getline(input, line))

    {

        output << line << endl ;

        cout<<line<<endl;

    }

    input.close();

    output.close();

    system("pause");

    return 0;

}