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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. import java.util.*;
  7.  
  8. /* Name of the class has to be "Main" only if the class is public. */
  9. class Ideone
  10. {
  11. 	public static void parse(String in)
  12. 	{
  13. 		try {
  14. 			// New string that will have spaces before the operators
  15. 			String in2 = "";
  16. 			// Insert spaces
  17. 			for (char c : in.toCharArray()) {
  18. 				if (c == '+' || c == '-' || c == '*' || c == '/') {
  19. 					in2 += ' ';
  20. 				}
  21. 				in2 += c;
  22. 			}
  23. 			// Scanner to parse the string
  24. 			Scanner inp = new Scanner(in2);
  25. 			int p1 = inp.nextInt();
  26. 			String op = inp.next();
  27. 			int p2 = inp.nextInt();
  28. 			solve(p1, op, p2);
  29. 		}
  30. 		catch (Exception e) {
  31. 			// End up here if something went wrong
  32. 			System.out.println(e);
  33. 		}
  34. 	}
  35.  
  36. 	public static int solve(int p1, String op, int p2)
  37. 	{
  38. 		try {
  39. 			// Do the calculation
  40. 			int answer = 0;
  41. 			switch (op) {
  42. 				case "+":
  43. 					answer = p1 + p2;
  44. 					break;
  45. 				case "-":
  46. 					answer = p1 - p2;
  47. 					break;
  48. 				case "*":
  49. 					answer = p1 * p2;
  50. 					break;
  51. 				case "/":
  52. 					// Note: will throw if p2 == 0
  53. 					answer = p1 / p2;
  54. 					break;
  55. 				default:
  56. 					throw new IllegalArgumentException();
  57. 			}
  58. 			System.out.println(p1 + op + p2 + "=" + answer);
  59. 			return answer;
  60. 		}
  61. 		catch (Exception e) {
  62. 			// End up here if something went wrong
  63. 			System.out.println(e);
  64. 			return 0;
  65. 		}
  66. 	}
  67.  
  68. 	public static void main (String[] args) throws java.lang.Exception
  69. 	{
  70. 		parse("-4443- +397");
  71. 		parse(" -8844443 / -73897 ");
  72. 		parse(" 4433* -7 ");
  73. 		parse(" +4 * -5897");
  74. 	}
  75. }
Success #stdin #stdout 0.24s 2841600KB
comments (?)
stdin 
Standard input is empty
stdout 
-4443-397=-4840
-8844443/-73897=119
4433*-7=-31031
4*-5897=-23588
https://ideone.com/r3P0MH
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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