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#include<stdio.h>
#include<stdlib.h>

int main (int argc, char *argv[])

{


float phi,r,l;

phi=3.14;


    printf("====================================\n");
    printf("||    MENGHITUNG LUAS LINGKARAN    ||\n");
    printf("====================================\n\n");
    printf("Jari-jari : \n");
    scanf("%f", &r);

    l = phi*r*r;
    printf("Luas Lingkaran = %0.2f ", l);

return 0;
}