ifstream

更详细的内容可以查看：https://blog.youkuaiyun.com/sinat_36219858/article/details/80369255#6ifstream-operator

#include <string>  
#include <iostream>  
#include <algorithm>  
#include <vector>  
#include <fstream>  
using namespace std;  
int main()  
{  
    ifstream in("name.txt");  
    string strtmp;  
    vector<string> vect;  
    while(getline(in, strtmp, '/n'))  
    vect.push_back(strtmp.substr(0, strtmp.find(' ')));  
    sort(vect.begin(), vect.end());  
    vector<string>::iterator it=unique(vect.begin(), vect.end());  
    copy(vect.begin(), it, ostream_iterator<string>(cout, "/n"));  
    return 0;  
}  
--------------------- 
作者：一定要顶上去 
来源：优快云 
原文：https://blog.youkuaiyun.com/jhfyuf/article/details/84022293 
版权声明：本文为博主原创文章，转载请附上博文链接！

#include<fstream>
#include<string>
#include<vector>
#include<iostream>
 
#define FILE_NAME "file1"
 
using namespace std;
 
int main()
 
{
 
        ifstream input_file;
 
        vector<string> ivec;
 
        string s;
 
        input_file.open(FILE_NAME, ifstream::in);
 
        while(!input_file.eof())
 
        {
 
                getline(input_file, s);
 
                ivec.push_back(s);
 
                //cout << s.c_str() << endl;
 
        }
 
        vector<string>::const_iterator itor = ivec.begin();
 
        for(itor;itor != ivec.end(); itor ++)
 
        {
 
                cout << *itor << endl;
 
        }
 
        return 0;
 
}
--------------------- 
作者：Leon_YUN 
来源：优快云 
原文：https://blog.youkuaiyun.com/sunear0/article/details/51567651 
版权声明：本文为博主原创文章，转载请附上博文链接！