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  1. //Saliha Babar                CS1A               Chapter 4, Page 223, #18
  2. //
  3. /************************************************************************
  4.  * 
  5.  * CALCULATE TIME FOR A SUBSTANCE TO TRAVEL
  6.  * ______________________________________________________________________
  7.  * This program allows user to choose from 3 substances and calculates the 
  8.  * time taken of that substance to travel.
  9.  * 
  10.  * Calculation is based on the formula
  11.  * time taken = distance / speed
  12.  *________________________________________________________________________
  13.  * INPUT 
  14.  *    choice     : user choice from  3 substances
  15.  * 
  16.  * OUTPUT
  17.  *    time taken : time taken for the substance to travel
  18.  * *********************************************************************/
  19. #include <iostream>
  20. #include <iomanip>
  21. using namespace std;
  22. int main() {
  23.  
  24. 	int choice; // INPUT - user choice of substance
  25. 	double distance; // INPUT - distance entered
  26. 	int const airSpeed = 1100; // INPUT - constant speed of air
  27. 	int const waterSpeed = 4900; // INPUT - constant speed of water
  28. 	int const steelSpeed = 16400; // INPUT - constant speed of steel
  29. 	double time; // OUTPUT - time taken to travel 
  30.  
  31. 	cout << "Choose a selection of substance\n";
  32. 	cout << "1 - air\n";
  33. 	cout << "2 - water\n";
  34. 	cout << "3 - steel\n";
  35. 	cin >> choice;
  36.  
  37. 	if ( choice >= 1 && choice <=3)
  38. 	{
  39. 		cout << "Now, enter a distance that the substance travel in meters .\n";
  40. 		cin >> distance;
  41.  
  42. 		if (distance > 0)
  43. 		{
  44. 			cout << fixed << showpoint << setprecision(4);
  45. 			switch (choice)
  46. 			{
  47. 			case 1 :
  48. 			time = distance / airSpeed ;
  49. 			cout << "Time taken is " << time << " seconds\n";
  50. 			break;
  51.  
  52. 			case 2 :
  53. 			time = distance / waterSpeed ;
  54. 			cout << "Time taken is " << time << " seconds\n";
  55. 			break;
  56.  
  57. 			case 3 :
  58. 			time = distance / steelSpeed ;
  59. 			cout << "Time taken is " << time << " seconds\n";
  60. 			break;
  61. 			}
  62. 		}
  63.  
  64. 		else
  65. 		{
  66. 			cout << "Only enter positive distance. Run the program again\n";
  67. 		}
  68. 	}
  69.  
  70. 	else 
  71. 	{
  72. 		cout << "Invalid Choice, run the program again with numbers 1-3\n" ;
  73. 	}
  74.  
  75. 	return 0;
  76. }
Success #stdin #stdout 0s 5280KB
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Choose a selection of substance
1 - air
2 - water
3 - steel
Invalid Choice, run the program again with numbers 1-3
https://ideone.com/XrVWPz
HW - Chapter 4 The Speed of Sound
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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