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("Voume=%.3f\n",volume);

 

         return 0;

}

double cylinder(double r,double h)

{

         double result;

 

         result=3.1415926*r*r*h;

 

         return result;

}