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#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
   float r, h;
   printf("pls enter the base's radius of the cylinder:");
   scanf("%f", &r);
   printf("pls enter the height of the cylinder:");
   scanf("%f", &h);

   if (r, h <=0){
    printf(" the height and radius must be a positive number!");
   } else {
    printf("the perimeter of base of the cylinder is:%f", 2*M_PI*r);
    printf("\nthe area of base of the cylinder is:%f", M_PI*r*r);
    printf("\nthe total surface are is:%f", h*2*M_PI*r+2* M_PI*r*r);
    printf("\nthe volume of the cylinder is:%f", h*M_PI*r*r);
   }

    return 0;
}