C++ prefix and postfix

Table of contents

Suffix/postfix increment and decrement

• a++, a--
• associativity: left to right
• precedence 2

Prefix increment and decrement

• ++a, --a
• associativity: right to left
• precedence 3

  int N{5};
  fmt::print("N++: {}   N: {}\n", N++, N);
  N = 5;  // reset;
  fmt::print("++N: {}   N: {}\n", ++N, N);
  N = 5;  // reset;
  fmt::print("N--: {}   N: {}\n", N--, N);
  N = 5;  // reset;
  fmt::print("--N: {}   N: {}\n", --N, N);
  N = 5;  // reset;
  fmt::print("++--N: {}   N: {}\n", ++--N, N);

Possible output

N++: 5   N: 6
++N: 6   N: 6
N--: 5   N: 4
--N: 4   N: 4
++--N: 5   N: 5

References

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