#include <stdio.h>
    #define  PI 3.141592
    #define  CIRCLE(R,L,S) L=2*PI*R; S=PI*(R)*(R)
    main()  {
      float r,l,s;
      printf("Please input r: \n");
      scanf("%f", &r);
      CIRCLE(r,l,s);
      printf("r=%f\ncirc=%f\narea=%f\n",r,l,s);
      while(1);
    }