dairenin alanını bulma

[Admin]

Kod:

#include <stdio.h>
#include <stdlib.h>
main()
{
int r;
float pi,alan;
pi=3.14;
printf("dairenin yari çapini gir=");
scanf("%d",&r);
alan=pi*(r*r);
printf("alan=%f\n",alan);

  system("PAUSE");
  return 0;
}