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  1. #include <iostream>
  2.  
  3. int main() { 
  4.   int a = 0;
  5.   std::cout << (a++) << "\n"; // Postfix ++, that you used. Prints 0
  6.   std::cout << a << "\n";     // but now a is 1.
  7.   std::cout << (++a) << "\n"; // Prefix ++, increases a and returns the increased value => Prints 2
  8.   std::cout << a << "\n";     // Prints 2
  9. }
Success #stdin #stdout 0s 2896KB
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https://ideone.com/QvkdlX
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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