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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		Stack s = new Stack();
  10. 		String a = " 1 6 / ";
  11. 		Scanner t = new Scanner(a);
  12. 		int result = 0;
  13.  
  14. 		while(t.hasNext())
  15. 		{
  16. 			if(t.hasNextInt())
  17. 			{
  18. 				int num = t.nextInt();
  19. 				s.push(num);
  20. 			} 
  21. 			else 
  22. 			{
  23. 				String operator = (String)t.next();
  24.  
  25. 				int op1, op2;
  26.  
  27. 				if(s.isEmpty())
  28. 					throw new RuntimeException ("not enough operants");
  29. 				op2 = (int)s.pop();
  30.  
  31. 				if(s.isEmpty())
  32. 					throw new RuntimeException ("not enough operator");
  33. 				op1 = (int)s.pop();
  34.  
  35. 				if(operator.equals("+"))
  36. 					result = op2 + op1;
  37. 				else if(operator.equals("-"))
  38. 					result = op2-op1;
  39. 				else if(operator.equals("*"))
  40. 					result = op2*op1;
  41. 				else if(operator.equals("/"))
  42. 					result = op2/op1;
  43. 				else
  44. 					throw new RuntimeException ("unrecognize operands");
  45. 			}
  46. 		}
  47. 		System.out.println(result);
  48. 	}
  49. }
Success #stdin #stdout 0.1s 380672KB
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Standard input is empty
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6
https://ideone.com/HVAqQX
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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