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  1. #include <iostream>
  2. #include <cmath>
  3. #include <iomanip>
  4. #include <string>
  5. #include <sstream>
  6.  
  7. using namespace std;
  8.  
  9. // Fungsi konversi string ke double valid
  10. bool parseDouble(const string& input, double& output) {
  11.     istringstream iss(input);
  12.     iss >> output;
  13.     return !iss.fail() && iss.eof();
  14. }
  15.  
  16. int main() {
  17.     const double GRAVITASI = 10.0;
  18.     double s, v, t;
  19.     int status = 1;
  20.  
  21.     string input;
  22.  
  23.     cout << "Masukkan sudut peluncuran (0-90 derajat): ";
  24.     getline(cin, input);
  25.     if (!parseDouble(input, s) || s < 0 || s > 90) {
  26.         status = 0;
  27.     }
  28.  
  29.     if (status == 1) {
  30.         cout << "Masukkan kecepatan awal (m/s): ";
  31.         getline(cin, input);
  32.         if (!parseDouble(input, v)) {
  33.             status = 0;
  34.         }
  35.     }
  36.  
  37.     if (status == 1) {
  38.         cout << "Masukkan tinggi pohon (m): ";
  39.         getline(cin, input);
  40.         if (!parseDouble(input, t)) {
  41.             status = 0;
  42.         }
  43.     }
  44.  
  45.     if (status == 0) {
  46.         cout << fixed << setprecision(2);
  47.         cout << "status : 0, ketinggian : 0.00" << endl;
  48.         return 0;
  49.     }
  50.  
  51.     double s_radian = s * (M_PI / 180.0);
  52.     double ketinggian = t + pow(v * sin(s_radian), 2) / (2 * GRAVITASI);
  53.  
  54.     cout << fixed << setprecision(2);
  55.     cout << "status : 1, ketinggian : " << ketinggian << endl;
  56.  
  57.     return 0;
  58. }
  59.  
Success #stdin #stdout 0.01s 5308KB
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Standard input is empty
stdout
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Masukkan sudut peluncuran (0-90 derajat): status : 0, ketinggian : 0.00
https://ideone.com/IonSvM
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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