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  1. //Maxwell Brewer            CS1A           Chapter 4, P. 220, #2
  2. //
  3. /***************************************************************
  4.  * 
  5.  * CONVERT ROMAN NUMERALS
  6.  * _____________________________________________________________
  7.  * 
  8.  * This program will take a number between 1 and 10, then
  9.  * convert it to the equivalent Roman Numeral using an
  10.  * infinite while loop and switch statement.
  11.  * _____________________________________________
  12.  * INPUT
  13.  * 
  14.  * number (1-10)
  15.  * 
  16.  * OUTPUT
  17.  * 
  18.  * number (I-X)
  19.  * 
  20.  ***************************************************************/
  21.  
  22. #include <iostream>
  23. #include <iomanip>
  24. #include <string>
  25.  
  26. using namespace std;
  27.  
  28. int main() {
  29.  
  30.   // Initialization
  31.  
  32.   const char ENT_NUM[]    = "Enter a number (1-10): ";
  33.   const char MSG_ROM[]    = "The Roman Numeral is: ";
  34.   const char MSG_ERROR[]  = "Invalid entry";
  35.  
  36.   int number;
  37.  
  38.   // Display input prompts
  39.  
  40.   cout << ENT_NUM;
  41.   cin >> number;
  42.  
  43.   // Output
  44.  
  45.   while (1)
  46.   {
  47.   	cout << MSG_ROM;
  48.  
  49.   	switch (number)
  50.   	{
  51.   	   case 1: cout << " I " << endl;
  52.   	   break;
  53.  
  54.   	   case 2: cout << " II " << endl;
  55.   	   break;
  56.  
  57.   	   case 3: cout << " III " << endl;
  58.   	   break;
  59.  
  60.   	   case 4: cout << " IV " << endl;
  61.   	   break;
  62.  
  63.   	   case 5: cout << " V " << endl;
  64.   	   break;
  65.  
  66.   	   case 6: cout << " VI " << endl;
  67.   	   break;
  68.  
  69.   	   case 7: cout << " VII " << endl;
  70.   	   break;
  71.  
  72.   	   case 8: cout << " VIII " << endl;
  73.   	   break;
  74.  
  75.   	   case 9: cout << " IX " << endl;
  76.   	   break;
  77.  
  78.   	   case 10: cout << " X " << endl;
  79.   	   break;
  80.  
  81.   	   default: cout << MSG_ERROR << endl;
  82.   	   break;
  83.   	} break;
  84.   } 
  85.  
  86. 	return 0;
  87. }
Success #stdin #stdout 0.01s 5276KB
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Enter a number (1-10): The Roman Numeral is:  VIII
https://ideone.com/SoWHdp
Chapter 4, P. 220, #2
language:
C++ (gcc 8.3)
created:
42 days ago
visibility:
public

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