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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 		private static final String[]	NUM_NAMES	= { "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" };
  11.  
  12. 	private static final String[]	TEEN_NAMES	= { "", "eleven", "twelve", "thirteen", "fourteen",
  13. 			"fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };
  14.  
  15. 	private static final String[]	TENS_NAMES	= { "", "ten", "twenty", "thirty", "forty", "fifty",
  16. 			"sixty", "seventy", "eighty", "ninety" };
  17.  
  18. 	private static int getRemainder(int dividend, int i, int k) {
  19. 		return ((dividend % (int) Math.pow(10, (i))) - (dividend % (int) Math.pow(10, (k))))
  20. 				/ (int) Math.pow(10, (k));
  21. 	}
  22.  
  23. 	/*
  24. 	 * The method convertNumToText is capable of evaluating numbers up to 999,999,999 and
  25. 	 * translating them into their readable English equivalent.
  26. 	 */
  27. 	private static String convertNumToText(int num) {
  28. 		// Uses StringBuilder to append values instead of String concatenation
  29. 		StringBuilder str = new StringBuilder();
  30. 		// Calculates the logarithmic value for the number entered
  31. 		int length = (int) (Math.log10(num));
  32. 		// Placeholder variable for the result of modulus calculations
  33. 		int remainder;
  34.  
  35. 		// Catches if the number being parsed is 0 and returns "zero"
  36. 		if (num == 0) {
  37. 			return "zero";
  38. 		}
  39.  
  40. 		/*
  41. 		 * This For Loop isolates every digit of the number entered,
  42. 		 * and appends the English value into a string
  43. 		 */
  44. 		for (int i = length; i >= 0; i--) {
  45.  
  46. 			/*
  47. 			 * Isolates the highest-level digit using modulus
  48. 			 * e.g. : ((4321%10^4) - (4321%10^3) / 10^3)
  49. 			 * = ((4000) - (321)) / 1000
  50. 			 * = 4
  51. 			 */
  52. 			remainder = getRemainder(num, i + 1, i);
  53.  
  54. 			/*
  55. 			 * IF the digits place is tens AND the value is not 10 (11-19) then apply the nomenclature of
  56. 			 * TEEN_NAMES
  57. 			 * 
  58. 			 * ELSE if the digits place is tens and 10,20,30... then apply the nomenclature TEN_NAMES
  59. 			 * 
  60. 			 * ELSE if no special nomenclature is required, just apply regular nomenclature NUM_NAMES
  61. 			 */
  62. 			if ((i == 1 || i == 4 || i == 7) && (remainder == 1 && ((10 + getRemainder(num, i, i - 1) != 10)))) {
  63. 				str.append(TEEN_NAMES[getRemainder(num, i, i - 1)]);
  64. 				i--; // Skip the ones value, since the TEENS naming consumes both tens and ones
  65. 			} else if (i == 1 || i == 4 || i == 7) {
  66. 				str.append(TENS_NAMES[remainder]);
  67. 				if (getRemainder(num, i, i - 1) != 0 && getRemainder(num, i+1, i) != 0) {
  68. 					str.append("-"); // If the value of the ones is not zero, then append a dash
  69. 				}
  70. 			} else {
  71. 				str.append(NUM_NAMES[remainder]);
  72. 			}
  73.  
  74. 			/*
  75. 			 * If the digit places is hundreds, then apply suffix of "hundred"
  76. 			 * 
  77. 			 * This is not a part of the thousand/million statements because those only have one
  78. 			 * placeholder and hundred has multiple
  79. 			 */
  80. 			if (remainder > 0 && (i == 2 || i == 5 || i == 8)) {
  81. 				str.append(" hundred ");
  82. 			}
  83.  
  84. 			/*
  85. 			 * IF the digits place is thousands, then apply suffix "thousand"
  86. 			 * 
  87. 			 * ELSE IF the digits place is millions, then apply suffix "million"
  88. 			 * 
  89. 			 * New line added for readability.
  90. 			 */
  91. 			if (i == 3) {
  92. 				str.append(" thousand,\n");
  93. 			} else if (i == 6) {
  94. 				str.append(" million,\n");
  95. 			}
  96. 			// For debugging purposes
  97. 			//System.out.println(remainder + " " + i);
  98. 		}
  99. 		// Converts the StringBuilder str into a string and returns the value
  100. 		return str.toString();
  101. 	}
  102. 	public static void main (String[] args) throws java.lang.Exception
  103. 	{
  104.  
  105. 	System.out.println(convertNumToText(231242));
  106. 	}
  107. }
Success #stdin #stdout 0.1s 320576KB
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two hundred thirty-one thousand,
two hundred forty-two


	

		
	 
	
	
			

					
			
			
			
			
			
			
			
			

			
			
			
		

	
		
		

			

			                        







			
			

				

	
					
					 https://ideone.com/jNf7ZR
					
					
					
					
					

												

												
						
						

					

					
					
					

						
language:

						
Java (HotSpot 12)

					

					

						
created:
								
						
8 years ago

					

					

						
visibility:

						

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