obdelnik

#include <stdio.h>

int main (int argc, char* argv[])
{
    double a = 0,b = 0;
    int x = 0;
    printf("zadej strany obdelnika \'a\' a \'b\': ");
    x = scanf("%lf %lf", &a, &b);
    if (x == 2)
        printf("Obsah: %.2f\nObvod: %.2f\n", (a*b), 2*(a+b));
    else
        printf("chyba");

    return 0;
}