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  1. //Xinnuo Wang            CS1A                   chapter 4, p.224  #19
  2. //
  3. /*******************************************************************************
  4.  * 
  5.  * Caculate meters the sound traveled
  6.  * _____________________________________________________________________________
  7.  * This program accepts the seconds of the sound traveled and caculate the 
  8.  * meters.
  9.  * 
  10.  * Computation is based on the formula:
  11.  * meters = speed * seconds
  12.  * _____________________________________________________________________________
  13.  * INPUT
  14.  *   Choice          : The choice you made to decide a type of gase.
  15.  *   Seconds         : The seconds the sound traveled
  16.  * OUTPUT
  17.  *   Meters          : The meters the sound traveled
  18.  * 
  19.  ******************************************************************************/
  20. #include <iostream>
  21. using namespace std;
  22.  
  23. int main() 
  24. {
  25. 	int choice;    // INPUT - The choice you made to decide a type of gase.
  26. 	float seconds; //INPUT - The seconds the sound traveled
  27. 	float meters;  //OUTPUT - The meters the sound traveled
  28. 	cout <<"===== MENU ====="<< endl;
  29. 	cout <<"1.Carbon Dioxide"<< endl;
  30. 	cout <<"2.Air"<< endl;
  31. 	cout <<"3.Helium"<< endl;
  32. 	cout <<"4.Hydrogen"<< endl;
  33. //
  34. //Data Input
  35. 	cout<<"Enter a number"<< endl;
  36. 	cin >> choice;
  37. 	cout << "Enter the seconds"<<endl;
  38. 	cin>> seconds;
  39. //
  40. //Check
  41. 	if (seconds<0 || seconds > 30)
  42. 	{
  43. 		cout << "Invalid time input" << endl;
  44. 		return 0;
  45. 	}
  46. //Output
  47. 	switch(choice)
  48. 	{
  49. 		case 1: 
  50. 		{
  51. 			meters= seconds * 258;
  52. 			cout<< "The sound traveled " << meters <<" meters."<<endl;break;
  53. 		}
  54. 	    case 2: 
  55. 		{
  56. 			meters= seconds * 331.5;
  57. 			cout<< "The sound traveled " << meters <<" meters."<<endl;break;
  58. 		}
  59. 		case 3: 
  60. 		{
  61. 			meters= seconds * 972.0;
  62. 			cout<< "The sound traveled " << meters <<" meters."<<endl;break;
  63. 		}
  64. 		case 4: 
  65. 		{
  66. 			meters= seconds * 1270.0;
  67. 			cout<< "The sound traveled " << meters <<" meters."<<endl;break;
  68. 		}
  69. 		default:
  70. 		cout <<"Invalid choice"<< endl;
  71. 	}
  72. 	return 0;
  73. }
Success #stdin #stdout 0.01s 5320KB
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===== MENU =====
1.Carbon Dioxide
2.Air
3.Helium
4.Hydrogen
Enter a number
Enter the seconds
Invalid time input
https://ideone.com/zOpXNP
language:
C++ (gcc 8.3)
created:
16 hours ago
visibility:
public

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