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  1. #include <iostream>
  2. #include <string>
  3. #include <sstream>
  4.  
  5. void print_city_totals( std::istream& input, std::ostream& output )
  6. {
  7.     constexpr char COMMA = ',' ;
  8.  
  9.     std::string line ;
  10.     while( std::getline( input, line ) ) // for each line input the input stream
  11.     {
  12.         std::istringstream stm(line) ;
  13.  
  14.         double first ;
  15.         stm >> first ; // get the first number
  16.  
  17.         stm.ignore( 100, COMMA ) ; // throw away the comma
  18.  
  19.         std::string city_name ;
  20.         std::getline( stm, city_name, ',' ) ; // read everything upto the comma into name
  21.  
  22.         double second ;
  23.         stm >> second ; // get thesecond number
  24.  
  25.         if(stm) output << city_name << ' ' << first+second << '\n' ;
  26.         else output << "[ error in line: '" << line << "' ]\n" ;
  27.     }
  28. }
  29.  
  30. int main()
  31. {
  32.     std::istringstream input( "15.1,Chico,17.4\n"
  33.                               "34.4,Seattle,30.52\n"
  34.                               "what is this?\n"
  35.                               "2.9,Portland,26.1\n"
  36.                               ".5,Death Valley,1.1\n" ) ;
  37.  
  38.     print_city_totals( input, std::cout ) ;
  39. }
  40.  
Success #stdin #stdout 0s 3032KB
comments (?)
stdin 
Standard input is empty
stdout 
Chico 32.5
Seattle 64.92
[ error in line: 'what is this?' ]
Portland 29
Death Valley 1.6
https://ideone.com/GFx61i
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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