#include<stdio.h> #include<stdbool.h> #include<conio.h> #include<math.h> #include<string.h> void main() { float s, r, p; float area(float r); float perimeter(float r); printf("enter radius: "); scanf("%f", &r); s = area(r); p = perimeter(r); printf("area of circle is %f", s); printf("\nPerimeter of circle is %f", p); } float area(float r) { float s; s = 3.14 * r * r; return s; } float perimeter(float r) { float p = 2 * 3.14 * r; return p; }