// Value Retunrning Function
#include <iostream>
using namespace std;
float f(float x);
int main()
{
	float x = 3, y;
	y = f(x);
	cout << y << endl;
	return 0;
}

float f(float x)
{
	float y = x * x;
	return y; 
	/* It's better to replace the above two lines by:
	return x * x;
	*/
}