计算圆柱体积

#include<stdio.h>
double cylinder(double r, double h)
{
	double result;
	result=3.1415926*r*r*h;
	printf("Volume=%.3f\n",result);
    return result; 
} 
int main()
{
	double height, radius, volume;
	printf("Enter radius and height:");
	scanf("%lf %lf",&radius,&height);
	cylinder(radius,height);
	return 0; 
}

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