Stringent compilers issue a warning message when a function’s return value is ignored. For example:

 int func(){  return 0;}int main(){  func(); //return value ignored}

Indeed, ignoring a function’s return value may indicate a bug. However, sometimes it is intentional and well behaved. To suppress the compiler warnings in this case, you can explicitly cast the return value to void:

 int main(){  (void) func(); //suppress compiler warnings about ignored return value}