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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <string>
  4.  
  5. enum class ReplaceState {
  6.     Begin, End
  7. };
  8.  
  9. int main() {
  10.  
  11.     using namespace std;
  12.  
  13.     string const begin_replace = "0 / END OF GENERATOR DATA, BEGIN BRANCH DATA";
  14.     string const end_replace = "0 / END OF BRANCH DATA, BEGIN TRANSFORMER DATA";
  15.  
  16.     ReplaceState state = ReplaceState::End;
  17.     string line; int replacing_number = 1;
  18.     while( getline(cin, line) ) {
  19.         // state change
  20.         if( line.find(begin_replace) != string::npos ) {
  21.             cout << line << endl;
  22.             state = ReplaceState::Begin;
  23.             continue;
  24.         } 
  25.         else if( line.find(end_replace) != string::npos ) {
  26.             cout << line << endl;
  27.             state = ReplaceState::End;
  28.             continue;
  29.         }
  30.         // determine to replace or not
  31.         if( state == ReplaceState::Begin ) {
  32.             // find 3rd comma
  33.             string::size_type comma = 0;
  34.             for( int cnt = 0; cnt != 3; ++cnt ) 
  35.                 comma = line.find_first_of( ',', comma+1 );
  36.  
  37.             // output first two fields
  38.             cout << line.substr( 0, comma+1 ) << " ";
  39.  
  40.             // output replacing number
  41.             cout << fixed << setprecision(5) << (float)replacing_number++;
  42.  
  43.             // output remained fields
  44.             comma = line.find_first_of( ',', comma+1 );
  45.             cout << line.substr( comma ) << endl;
  46.         } else {
  47.             cout << line << endl;
  48.         }
  49.     }
  50. } // main()
Success #stdin #stdout 0s 3020KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/bbhNY2
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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