C++ 实用的小程序

 1 #include <iostream>
 2 #include <string>
 3 #include <fstream>
 4 #include <sstream>
 5 #include <iostream>
 6 using namespace std;
 7 int main(){
 8 
 9     ifstream file;
10     file.open("/home/wangxiao/Downloads/Link to ASPL---code/features/test_ids.txt");
11     ofstream in("/home/wangxiao/Downloads/test_ids_repaired.txt");
12 
13     std::string line;
14     std::string image_id;
15 
16     while(getline(file, line)){
17         std::string add = "1_";
18         line = add + line;
19 
20         image_id = line;
21         in<<image_id<<endl;
22     }
23  }