main() function requirements

• The main() function must return int​
  • The return values are​ 0 and -1
    • 0: SUCCESS
    • -1: FAILURE (any non-zero can be used)​
  • C++ Core Guideline
  • Main function specifications
• The two forms allowed are:​
  • int main() { body }​
  • int main( int argc, char *argv[] ) { body }​