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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. 	public static Scanner input = new Scanner(System.in);
  10. 	public static double placeHolder;
  11.  
  12. 	public static void clear() {
  13. 		placeHolder = 0.0;
  14. 		System.out.println("Save has been deleted, Screen has been cleared.");
  15. 	}
  16.  
  17. 	public static void end() {
  18. 		System.out.println("Program ended..");
  19. 		input.close();
  20. 		System.exit(0);
  21. 	}
  22.  
  23. 	public static void save(double initValue) {
  24. 		System.out.println("Number saved!");
  25. 		placeHolder = initValue;
  26. 	}
  27.  
  28. 	public static void recall() {
  29. 		if (placeHolder != 0) {
  30. 			System.out.println("Memory Place Holder Set To: " + placeHolder);
  31. 		} else {
  32. 			System.out.println("There is no data saved.");
  33. 		}
  34. 	}
  35.  
  36. 	public static void commands() {
  37. 		System.out.println("e = end | c = clear | m = save | r = recall | o = continue");
  38. 		String command = input.next();
  39. 		if (command.equals("e")) {
  40. 			end();
  41. 		} else if (command.equals("c")) {
  42. 			clear();
  43. 		} else if (command.equals("r")) {
  44. 			recall();
  45. 		}
  46.  
  47. 	}
  48.  
  49. 	public static void main(String[] args) {
  50. 		boolean loop = true;
  51. 		while (loop == true) {
  52. 			commands();
  53. 			System.out.println("Please enter what you would like to do: (+,-,*,/,%)");
  54. 			String function = input.next();
  55. 			System.out.println("Enter the first number to be calucalted (If dividing, this is the numerator):");
  56. 			double n1 = input.nextDouble();
  57. 			System.out.println("Enter the second number to be calucalted (If dividing, this is the denominator):");
  58. 			double n2 = input.nextDouble();
  59.  
  60. 			// =======================
  61. 			// Addition
  62. 			// =======================
  63. 			if (function.equals("+")) {
  64. 				double sum = n1 + n2;
  65. 				System.out.println(n1 + "+" + n2 + " = " + sum);
  66. 				System.out.println("e = end | c = clear | m = save | r = recall");
  67. 				String command = input.next();
  68. 				// input.nextLine();
  69. 				switch (command) {
  70. 				case "e":
  71. 					end();
  72. 					break;
  73. 				case "c":
  74. 					clear();
  75. 					break;
  76. 				case "m":
  77. 					save(sum);
  78. 					break;
  79. 				case "r":
  80. 					recall();
  81. 					break;
  82. 				default:
  83. 					System.out.println("Default");
  84. 					save(sum);
  85. 					break;
  86. 				}
  87.  
  88. 			}
  89. 			// =======================
  90. 			// Subtraction
  91. 			// =======================
  92. 			else if (function.equals("-")) {
  93. 				double sum = n1 - n2;
  94. 				System.out.println(n1 + "-" + n2 + " = " + sum);
  95. 				System.out.println("e = end | c = clear | m = save | r = recall");
  96. 				String command = input.next();
  97. 				// input.nextLine();
  98. 				switch (command) {
  99. 				case "e":
  100. 					end();
  101. 					break;
  102. 				case "c":
  103. 					clear();
  104. 					break;
  105. 				case "m":
  106. 					save(sum);
  107. 					break;
  108. 				case "r":
  109. 					recall();
  110. 					break;
  111. 				}
  112. 			}
  113. 			// =======================
  114. 			// Multiplication
  115. 			// =======================
  116. 			else if (function.equals("*")) {
  117. 				double sum = n1 * n2;
  118. 				System.out.println(n1 + "*" + n2 + " = " + sum);
  119. 				System.out.println("e = end | c = clear | m = save | r = recall");
  120. 				String command = input.next();
  121. 				// input.nextLine();
  122. 				switch (command) {
  123. 				case "e":
  124. 					end();
  125. 					break;
  126. 				case "c":
  127. 					clear();
  128. 					break;
  129. 				case "m":
  130. 					save(sum);
  131. 					break;
  132. 				case "r":
  133. 					recall();
  134. 					break;
  135. 				}
  136. 			}
  137. 			// =======================
  138. 			// Division
  139. 			// =======================
  140. 			else if (function.equals("/")) {
  141. 				double sum = n1 / n2;
  142. 				System.out.println(n1 + "/" + n2 + " = " + sum);
  143. 				System.out.println("e = end | c = clear | m = save | r = recall");
  144. 				String command = input.next();
  145. 				// input.nextLine();
  146. 				switch (command) {
  147. 				case "e":
  148. 					end();
  149. 					break;
  150. 				case "c":
  151. 					clear();
  152. 					break;
  153. 				case "m":
  154. 					save(sum);
  155. 					break;
  156. 				case "r":
  157. 					recall();
  158. 					break;
  159. 				}
  160. 			}
  161. 			// =======================
  162. 			// Mod
  163. 			// =======================
  164. 			else if (function.equals("%")) {
  165. 				double sum = n1 % n2;
  166. 				System.out.println(n1 + "%" + n2 + " = " + sum);
  167. 				System.out.println("e = end | c = clear | m = save | r = recall");
  168. 				String command = input.next();
  169. 				// input.nextLine();
  170. 				switch (command) {
  171. 				case "e":
  172. 					end();
  173. 					break;
  174. 				case "c":
  175. 					clear();
  176. 					break;
  177. 				case "m":
  178. 					save(sum);
  179. 					break;
  180. 				case "r":
  181. 					recall();
  182. 					break;
  183. 				}
  184. 			}
  185. 		}
  186.  
  187. 		// =======================
  188. 		// Dictate loop duration:
  189. 		// =======================
  190. 		System.out.println("Would you like to continue? (Y|N): ");
  191. 		String ans = input.nextLine();
  192. 		if (ans.equals("N") || ans.equals("n")) {
  193. 			System.out.println("Closing Program");
  194. 			loop = false;
  195. 			end();
  196. 		}
  197. 	}
  198. }
Runtime error #stdin #stdout #stderr 0.05s 4386816KB
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stdin
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Standard input is empty
stdout
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e = end | c = clear | m = save | r = recall | o = continue
stderr
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Exception in thread "main" java.util.NoSuchElementException
	at java.util.Scanner.throwFor(Scanner.java:862)
	at java.util.Scanner.next(Scanner.java:1371)
	at Ideone.commands(Main.java:38)
	at Ideone.main(Main.java:52)
https://ideone.com/JD1VQ0
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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