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  1.     #include <iostream>                                                           
  2.     #include <string>                                                             
  3.     #include <sstream>                                                            
  4.     #include <stdexcept>                                                          
  5.  
  6.     int                                                                           
  7.     main (int argc, char *argv[])                                                 
  8.     {                                                                             
  9.       std::string line;                                                           
  10.  
  11.       while (std::getline (std::cin, line)) {                                     
  12.         int N, M;                                                                 
  13.         std::istringstream iss (line);                                            
  14.  
  15.         if (!(iss >> N >> M))                                                     
  16.           throw std::runtime_error ("input error #1");                            
  17.  
  18.         std::cerr << "N = " << N << ", M = " << M << std::endl;                   
  19.  
  20.         for (int i =0; i < M; ++i) {                                              
  21.           std::string word;                                                       
  22.           int value1, value2;                                                     
  23.  
  24.           if (!(iss >> word))                                                     
  25.             throw std::runtime_error ("input error #2");                          
  26.  
  27.           std::istringstream inner_iss (word);                                    
  28.  
  29.           if (inner_iss.peek () != '(' || !inner_iss.ignore () || !(inner_iss >> value1))
  30.             throw std::runtime_error ("unexpected tokens; expected (, <value1>"); 
  31.  
  32.           if (inner_iss.peek () != ',' || !inner_iss.ignore ()  || !(inner_iss >> value2))
  33.             throw std::runtime_error ("unexpected tokens; expected , <value2>");  
  34.  
  35.           if (inner_iss.peek () != ')')                                           
  36.             throw std::runtime_error ("unexpected token expected )");             
  37.  
  38.           std::cerr << "\t value1 = " << value1 << ", value2 = " << value2 << std::endl;
  39.         }                                                                                                                                                                                                                 
  40.       }                                                                           
  41.     }
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https://ideone.com/g2dT9
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
secret

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