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; }