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  1. #include <iostream>
  2. #include <limits>
  3. #include <string>
  4. #include <stdio.h>
  5.  
  6. std::string itos(int n)
  7. {
  8.    const int max_size = std::numeric_limits<int>::digits10 + 1 /*sign*/ + 1 /*0-terminator*/;
  9.    char buffer[max_size] = {0};
  10.    sprintf(buffer, "%d", n);
  11.    return std::string(buffer);
  12. }
  13.  
  14. #define HERE (std::string(__FILE__) + "(" + itos(__LINE__) + "): ")
  15.  
  16. int main()
  17. {
  18.     std::cout << HERE + "Hello world" << std::endl;
  19. }
Success #stdin #stdout 0.01s 2816KB
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Standard input is empty
stdout
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prog.cpp(18): Hello world
https://ideone.com/mKmZVE
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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