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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. bool parseDouble(const string& input, double& output) {
  10.     istringstream iss(input);
  11.     iss >> output;
  12.     return !iss.fail() && iss.eof();
  13. }
  14.  
  15. int main() {
  16.     const double GRAVITASI = 10.0;
  17.     double s, v, t;
  18.     int status = 1;
  19.  
  20.     string input;
  21.  
  22.     cout << "Masukkan sudut peluncuran (0-90 derajat): ";
  23.     getline(cin, input);
  24.     if (!parseDouble(input, s) || s < 0 || s > 90) {
  25.         status = 0;
  26.     }
  27.  
  28.     if (status == 1) {
  29.         cout << "Masukkan kecepatan awal (m/s): ";
  30.         getline(cin, input);
  31.         if (!parseDouble(input, v)) {
  32.             status = 0;
  33.         }
  34.     }
  35.  
  36.     if (status == 1) {
  37.         cout << "Masukkan tinggi pohon (m): ";
  38.         getline(cin, input);
  39.         if (!parseDouble(input, t)) {
  40.             status = 0;
  41.         }
  42.     }
  43.  
  44.     if (status == 0) {
  45.         cout << fixed << setprecision(2);
  46.         cout << "status : 0, ketinggian : 0.00" << endl;
  47.         return 0;
  48.     }
  49.  
  50.     double s_radian = s * (M_PI / 180.0);
  51.     double ketinggian = pow(v * sin(s_radian), 2) / (2 * GRAVITASI);
  52.  
  53.     cout << fixed << setprecision(2);
  54.     cout << "status : 1, ketinggian : " << ketinggian << endl;
  55.  
  56.     return 0;
  57. }
  58.  
Success #stdin #stdout 0.01s 5316KB
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Masukkan sudut peluncuran (0-90 derajat): Masukkan kecepatan awal (m/s): Masukkan tinggi pohon (m): status : 1, ketinggian : 181.09
https://ideone.com/TarF4L
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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