#include <stdio.h>

double square(double x)
{
	double result;

	result = x * x;
	return result;
}


int main()
{
	double number, sq;

	printf("enter a number:\n");
	scanf("%lf", &number);

	sq = square(number);
	printf("the square of %.2lf is %.2lf\n", number, sq);
}