#include <stdio.h>
#include <math.h>
 
// Definisikan nilai Pi dan percepatan gravitasi (g)
#define PI 3.14159265358979323846
#define GRAVITASI 9.8 // Menggunakan g = 9.8 m/s^2
 
int main() {
    double v0; // Kecepatan awal (m/s)
    double alpha_derajat; // Sudut elevasi (derajat)
    double alpha_radian; // Sudut elevasi (radian)
    double t_total; // Waktu tempuh total (s)
 
    // Input dari pengguna
    printf("--- Kalkulator Waktu Tempuh Jarak Terjauh Gerak Parabola ---\n");
    printf("Masukkan kecepatan awal (v0) dalam m/s: ");
    scanf("%lf", &v0);
 
    printf("Masukkan sudut elevasi (alpha) dalam derajat: ");
    scanf("%lf", &alpha_derajat);
 
    // 1. Konversi sudut dari derajat ke radian
    // Fungsi trigonometri di C (sin, cos) menerima input dalam radian
    alpha_radian = alpha_derajat * (PI / 180.0);
 
    // 2. Hitung waktu tempuh total (t_total)
    // Rumus: t_total = (2 * v0 * sin(alpha)) / g
    t_total = (2.0 * v0 * sin(alpha_radian)) / GRAVITASI;
 
    // Output hasil
    printf("\n--- Hasil Perhitungan ---\n");
    printf("Kecepatan Awal (v0)      : %.2lf m/s\n", v0);
    printf("Sudut Elevasi (alpha)    : %.2lf derajat\n", alpha_derajat);
    printf("Percepatan Gravitasi (g) : %.2lf m/s^2\n", GRAVITASI);
    printf("-----------------------------------------\n");
    printf("**Waktu Tempuh Jarak Terjauh (t_total) : %.4lf detik**\n", t_total);
 
    return 0;
}

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