Throwing an Exception
	void user_terminate() {          //user supplied terminate   cout <<"user terminate function calling exit" <<endl;   exit(1);                       //abnormal program exit } int main() {   int i;   set_terminate(user_terminate); //install user function   cout <<"Enter an integer: ";   cin >>i;   if (i != 42)                   //detect error condition     throw i;                     //throw an exception   cout <<"no throw was executed" <<endl;   cout <<"normal program exit; i = " <<i <<endl;   return(0); }