C++ 实用的小程序

１．　打开test_ids.txt　将里面的东西添加"1_",然后另存为test_ids_repaired.txt

 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  }