I have no problems with your code, try this:

Code:
#include <iostream>
#include <conio.h>

using namespace std;

int mult(int x, int y);

int main()
{
	int x, y;

	cout<<"Please input two numbers to be multiplied: ";

	cin>>x>>y;

	cout<<"The product of your two numbers is "<<mult(x, y);

	getch();
	return 0;
}

int mult(int x, int y)
{
	return x*y;
}
PS: Use code /code tags between []