void main() {
Delegate<string> nameFunctions;
nameFunctions += SayHello;
nameFunctions += SayGoodBye;
//nameFunctions += PrintSum; // compiler error; PrintSum does not take a string as an argument
nameFunctions("John Doe");
nameFunctions("Jane Doe");

Delegate<int, int> numberFunctions;
numberFunctions += PrintSum;
numberFunctions += PrintDifference;

numberFunctions(1,2);
numberFunctions(2,2)
 
/* Output is
Hello John Doe
Goodbye John Doe
Hello Jane Doe
Goodbye Jane Doe

The sum is 3
The difference is -1
The sum is 4
The difference is 0 */
}

void SayHello(string name) {
cout << " Hello " << name;
}

void SayGoodbye(string name) {
cout << " Goodbye " << name;
}

void PrintSum(int number1, int number2) {
cout << " The sum is " << number1 + number2;
}

void PrintDifference(int number1, int number2) {
cout << "The difference is " << number1 - number2;
}