#include <stdio.h>
#define phi 3.14
 
void Identitas(){
printf("=== Tugas Informatika ===\n");
printf("Nama: %s\n", "Nakhla Septiasya Muliadiasti");
printf("Kelas: %s\n", "X K");
printf("Absen: %s\n", "23");
}
 
void LuasLingkaran(){
float radius, luas;
 
printf("=== Menghitung Luas Lingkaran===\n");
printf("radius lingkaran: ");
scanf("%f", &radius);
 
luas= phi * radius * radius;
 
printf("luas lingkaran dengan radius %.2f adalah: %.2f\n", radius,luas);
}
 
int main()
{
Identitas();
LuasLingkaran();
 
}
 

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