#include <stdio.h>
#define PI 3.14159265
 
int main(int argc, const char * argv[])
{
 
    // insert code here...
   // printf("Hello, World!\n");
 
    float radius, diameter, area, circumference;
 
    printf("\n Enter the diameter of the circle\n");
    scanf("%f",&diameter);
 
    radius=diameter/2.0;
 
    circumference= 2.0*PI*radius;
    area=PI*(radius)*(radius);
 
    printf("\n The area of the circle is: %.2f\n", area);
    printf("\n The circumference of the circle is: %.2f\n", circumference);
 
 
 
    return 0;
}
 

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6