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  1. #include <iostream>
  2. #include <sstream>
  3. #include <fstream>
  4. #include <string>
  5. #include <unordered_map>
  6.  
  7. struct Person
  8. {
  9.    std::string code;
  10.    int         data;
  11. };
  12.  
  13. typedef std::unordered_map<int, Person> PersonMap;
  14.  
  15. int main()
  16. {
  17.    //std::ifstream fin("test.txt"); // here std::cin
  18.  
  19.    PersonMap persons;
  20.  
  21.    /* line by line reading */
  22.    for (std::string line; std::getline(std::cin, line); )
  23.    {
  24.       std::istringstream iss(line);
  25.  
  26.       int    personId;
  27.       Person personData;
  28.  
  29.       /* parse line as std::string, int, int */
  30.       iss >> personData.code >> personId >> personData.data;
  31.  
  32.       /* insert into map and save result */
  33.       std::pair<PersonMap::iterator, bool> insertResult =
  34.          persons.insert(std::pair<int, Person>(personId, personData));
  35.  
  36.       /* if personId is already there */
  37.       if (!insertResult.second)
  38.       {
  39.          insertResult.first->second.data += personData.data;
  40.       }
  41.    }
  42.  
  43.    /* output whole map */
  44.    for(auto const &person : persons)
  45.    {
  46.       std::cout << person.first << " : " << person.second.data << "\n";
  47.    }
  48.    std::cout << std::flush;
  49. }
Success #stdin #stdout 0s 16072KB
comments (?)
stdin 
A 123456 0
G 123456 5
A 235334 0
B 123456 2
stdout 
235334 : 0
123456 : 7
https://ideone.com/HhTzaj
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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