Show the sizes of C++ built-in types (useful for 32/64 bit systems)

sizes.cpp

#include <iostream>

#define SIZE(type) std::cout << #type ": " << sizeof(type) << " bytes\n";

int main(int argc, char** argv ) {
  SIZE(char);
  SIZE(short);
  SIZE(int);
  SIZE(long);
  SIZE(float);
  SIZE(double);
  SIZE(void*);
  SIZE(NULL);
  SIZE(0);
  SIZE('\0');
  return 0;
}