#include <stdio.h>

main()
{

      double   pi = 3.1415926536;
      float    radi;
      double   area;
      double    peri;

      printf("Please enter the radius of the circle: ");
      scanf("%f", &radi);

      area = pi * radi * radi;

      printf("The area of the circle is %.3f\n", area);
      printf("\n");
      printf("Please enter the radius of the circle: ");
      fflush(stdin);
      scanf("%f", &radi);

      peri = 2 * pi * radi;
      printf("The perimeter of the circle is %.2f\n", peri);
      fflush(stdin);
      getchar();
}