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  1. //Jeremy Huang CS1A Chapter 4, P. 224, #19
  2. //
  3. /**************************************************************
  4.  *
  5.  * COMPUTE DISTANCE TRAVELLED IN MEDIUM
  6.  * ____________________________________________________________
  7.  * This program takes input on which medium to calculate. It then
  8.  * uses the speed of sound within that medium to calculate the
  9.  * distance travelled based on the user input.
  10.  * ____________________________________________________________
  11.  * INPUT
  12.  * choice        : choice from 1-4 to choose medium
  13.  * time          : the amount of time sound travels in medium
  14.  *
  15.  * OUTPUT
  16.  * distance      : amount of meters sound travelled through the medium
  17.  *
  18.  **************************************************************/
  19. #include <iostream>
  20. #include <iomanip>
  21. using namespace std;
  22.  
  23. int main() {
  24.     const int CARBON_DIOXIDE_CHOICE = 1;
  25.     const int AIR_CHOICE = 2;
  26.     const int HELIUM_CHOICE = 3;
  27.     const int HYDROGEN_CHOICE = 4;
  28.  
  29.     const float SPEED_IN_CO2 = 258.0;
  30.     const float SPEED_IN_AIR = 331.5;
  31.     const float SPEED_IN_HELIUM = 972.0;
  32.     const float SPEED_IN_HYDROGEN = 1270.0;
  33.  
  34.     int choice;       //INPUT - choice from 1-4 to choose medium
  35.     float time;       //INPUT - the amount of time sound travels in medium
  36.     float distance;   //OUTPUT - amount of meters sound travelled through the medium
  37.  
  38. //User Input
  39.     cout << "Select a gas from the menu:"<<endl<<endl
  40.          << "1. Carbon Dioxide"<<endl
  41.          << "2. Air"<<endl
  42.          << "3. Helium"<<endl
  43.          << "4. Hydrogen"<<endl<<endl
  44.          << "Enter your choice: ";
  45.     cin >> choice;
  46.     cout << fixed << setprecision(1);
  47.  
  48.     //Output Result
  49.     switch (choice) {
  50.         case CARBON_DIOXIDE_CHOICE:
  51.             cout << "Enter the number of seconds (0-30): ";
  52.             cin >> time;
  53.  
  54.             if (time >= 0 && time <= 30) {
  55.                 distance = SPEED_IN_CO2 * time;
  56.                 cout << "The sound traveled " << distance << " meters." << endl;
  57.             } else {
  58.                 cout << "Invalid input. Time must be between 0 and 30 seconds." << endl;
  59.             }
  60.             break;
  61.  
  62.         case AIR_CHOICE:
  63.             cout << "Enter the number of seconds (0-30): ";
  64.             cin >> time;
  65.  
  66.             if (time >= 0 && time <= 30) {
  67.                 distance = SPEED_IN_AIR * time;
  68.                 cout << "The sound traveled " << distance << " meters." << endl;
  69.             } else {
  70.                 cout << "Invalid input. Time must be between 0 and 30 seconds." << endl;
  71.             }
  72.             break;
  73.  
  74.         case HELIUM_CHOICE:
  75.             cout << "Enter the number of seconds (0-30): ";
  76.             cin >> time;
  77.  
  78.             if (time >= 0 && time <= 30) {
  79.                 distance = SPEED_IN_HELIUM * time;
  80.                 cout << "The sound traveled " << distance << " meters." << endl;
  81.             } else {
  82.                 cout << "Invalid input. Time must be between 0 and 30 seconds." << endl;
  83.             }
  84.             break;
  85.  
  86.         case HYDROGEN_CHOICE:
  87.             cout << "Enter the number of seconds (0-30): ";
  88.             cin >> time;
  89.  
  90.             if (time >= 0 && time <= 30) {
  91.                 distance = SPEED_IN_HYDROGEN * time;
  92.                 cout << "The sound traveled " << distance << " meters." << endl;
  93.             } else {
  94.                 cout << "Invalid input. Time must be between 0 and 30 seconds." << endl;
  95.             }
  96.             break;
  97.  
  98.         default:
  99.             cout << "Invalid choice. Please run the program again and select 1, 2, 3, or 4." << endl;
  100.             break;
  101.     }
  102. 	return 0;
  103. }
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Select a gas from the menu:

1. Carbon Dioxide
2. Air
3. Helium
4. Hydrogen

Enter your choice: Enter the number of seconds (0-30): The sound traveled 5160.0 meters.
https://ideone.com/onrdrN
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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