第5章例5-1

#include<stdio.h>
int main(void)
{
	double height,radius,volume;
	double cylinder(double r,double h);

	printf("Enter radius and height:");
	scanf("%lf%lf",&radius,&height);
	volume = cylinder(radius,height);
	printf("Volume = %.3f\n",volume);

	return 0;
}


double cylinder(double r,double h)
{
	double result;

	result = 3.1415926*r*r*h;

	return result;
}