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  1. // =============================================================
  2. //Nicolas Ruano            CS1A            Chapter 5, P. 294, #4
  3. //
  4. /**************************************************************
  5. *
  6. * COMPUTES AND DISPLAYS CALORIES BURNED AT 3.9 Cal/min CONSTANT.
  7. * ____________________________________________________________
  8. * This program computes and displays calories burned on a 
  9. * treadmill at a constant rate of 3.9 calories per minute. After 
  10. * the user enters a non-negative speed, it shows total calories 
  11. * burned after 10, 15, 20, 25, and 30 minutes. If a negative 
  12. * speed is entered, the user is prompted again until a valid 
  13. * value is given.
  14. *
  15. * Computation is based on the formula:
  16. * Calories Burned = Time in Minutes×3.9Calories Burned.
  17. * ____________________________________________________________
  18. * INPUT
  19. *   speed
  20. *
  21. *
  22. * OUTPUT
  23. *   minutes
  24. *   caloriesBurned
  25. *
  26. **************************************************************/
  27.  
  28. #include <iostream>   // For input and output
  29.  
  30. using namespace std;
  31.  
  32. int main() {
  33.     // --- Step 1: Declare variables ---
  34.     double speed;                 // User's running speed
  35.     const double CALORIES_PER_MINUTE = 3.9; // Fixed rate
  36.     int times[] = {10, 15, 20, 25, 30};     // Times to calculate
  37.     int numberOfTimes = 5;                  // Total time entries
  38.  
  39.     // --- Step 2: Ask for speed ---
  40.     cout << "Enter your running speed: ";
  41.     cin >> speed;
  42.  
  43.     // --- Step 3: Input validation ---
  44.     while (speed < 0) {
  45.         cout << "Speed must be zero or positive. Please enter again: ";
  46.         cin >> speed;
  47.     }
  48.  
  49.     // --- Step 4: Loop through the time values ---
  50.     for (int i = 0; i < numberOfTimes; i++) {
  51.         int minutes = times[i];  // Current time from the list
  52.         double caloriesBurned = minutes * CALORIES_PER_MINUTE;
  53.         cout << "After " << minutes << " minutes: "
  54.              << caloriesBurned << " calories burned." << endl;
  55.     }
  56.  
  57.     // --- Step 5: End the program ---
  58.     return 0;
  59. }
Success #stdin #stdout 0s 5324KB
comments (?)
stdin 
Standard input is empty
stdout 
Enter your running speed: After 10 minutes: 39 calories burned.
After 15 minutes: 58.5 calories burned.
After 20 minutes: 78 calories burned.
After 25 minutes: 97.5 calories burned.
After 30 minutes: 117 calories burned.
https://ideone.com/Mg1kco
language:
C++ (gcc 8.3)
created:
21 hours ago
visibility:
public

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