Use of functions

[moot1]

I really haven't found a use of multiple function yet, so can you please post a very simple program that has two functions that has to use two functions no matter what.

[frzatchary]

void divide(double, double); 

int main()
{
	double num1, num2;

	cout << "Enter two numbers and I will divide the first\n";
	cout << "number by the second: ";
	cin >> num1 >> num2;
	divide(num1, num2);
	return 0;
}
void divide(double arg1, double arg2)
{
	if(arg2 == 0.0)
	{
		cout << "Sorry, I give an undefined solution.\n";
		return;
	}
	cout << "The quotient is " << (arg1 / arg2) << endl;
}

Very basic program that my instructor had us write in my class. Only two functions are here: "void divide(double, double)" and "int main()".

[moot1]

thx for the help

[Dstrayex]

another reason to use them is that they can help keep your program more organized and let'you change a specific part of the program easier.