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(C++) std::cerr

 

std::cerr (abbreviation of 'character error stream') is a stream for error information.

 

#include <iostream>

int main()
{
  std::cout << "Start of program\n";
  std::cerr << "Error message: now in middle of program\n";
  std::cout << "End of program\n";
}

 

Screen output:

 

Start of program
End of program

 

Qt Creator IDE output (while in debugging mode):

 

Error message: now in middle of program
Start of program
End of program

 

 

 

 

 

 

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