C++ Function problems

// in c++ we use iostream without the .h and stdlib without the .h with a c in the front// This is because iostream.h never officially existed as part of standard c++ and// in order to remind people that this isn't C we change stdlib.h to it's c++ version.// You don't use any functions from cstdlib in this example, but I'll keep it in anyway.#include <iostream>#include <cstdlib>// Now that we are using the proper header files, we need to either a)bring all of the// standard symbols into the current scope, b)bring only the standard symbols// we want into the current scope, or c)qualify every standard symbol with std::// I'm going with b)using std::cout;using std::cin;using std::endl;// You spelled division wrong here.  Personally I would have called it divide (as in I want// to divide two numbers) rather than division (I want to division two numbers sounds strange).// However, I will rename x and y as dividend and divisor (see future comment)int division(int dividend, int divisor);int main(){	// x, y, and var aren't always horrible names for variables, but in this case there are	// very good names from mathematics we can steal.  Given c = a / b then a is	// the dividend, b is the divisor, and c is the quotient.  We now have perfectly	// descriptive names for the new variables.	int dividend, divisor, quotient;	// With better names for our variables we can write better instructions to the user:	cout << " Please input the dividend: ";	cin >> dividend;	// Remember: if a is greater than b then this implies that b is less than a.	cout << " Please input the divisor so that it is less than the dividend: ";	cin >> divisor;	quotient = division(dividend, divisor); // don't put int before x or y, they already HAVE a type!	// I added blocks.  They aren't really necessary, but I think it clarifies things... especially when you put	// several comments between the if statement and the output statement like this.	if (quotient == -1)	{		// Reworded your output statement and changed the \n to an endl to be consistant with the else statement		// we could have also rewritten the else statement to use \n		cout << "Hey your divisor was too big..." << endl;	}	else	{		// reworded output statement.		cout << "Dividend / divisor = " << quotient << endl;	}	return 0;}// Again, I added blocks.  This is just a style preference.int division(int dividend, int divisor){	if (dividend > divisor)	{		return (dividend / divisor);	}	else	{		return ( -1);	}}