c++ primer学的七七八八

c++学习

流文件的读入

#include <string>
#include <sstream>
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
void ReadFileToVec(const string& fileName, vector<string>& vec)
{
    ifstream ifs(fileName);
    if (ifs)
    {
        string buf;
        while (getline(ifs, buf))
            vec.push_back(buf);
    }
}
int main()
{
    string fileName = "./123.txt";
    vector<string> temp;
    ReadFileToVec(fileName,temp);
    for(auto i:temp)
    {
        cout << i << "\n";
    }
    return 0;
}