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  1. /**
  2.  * Add two numbers without '+' operator refer:
  3.  * http://e...content-available-to-author-only...a.org/wiki/Adder_%28electronics%29#Half_adder
  4.  * @author PRATEEK
  5.  */
  6. class AddNumbers {
  7.  
  8. 	public static int add1(int a, int b) {
  9. 		while (b != 0) {
  10. 			int carry = a & b;
  11. 			a = a ^ b;
  12. 			b = carry << 1;
  13. 		}
  14.  
  15. 		return a;
  16. 	}
  17.  
  18. 	public static int add2(int a, int b) {
  19. 		if (b == 0)
  20. 			return a;
  21. 		else
  22. 			return add2(a ^ b, (a & b) << 1);
  23. 	}
  24.  
  25. 	public static int add3(int a,int b){
  26. 		int carry= a & b;
  27. 		int sum= a ^ b;
  28.  
  29. 		carry = 2* carry;
  30.  
  31. 		sum = sum ^ carry;
  32.  
  33. 		return sum;
  34.  
  35. 	}
  36.  
  37. 	public static int add4(int a,int b){
  38. 		return ( 2*( a & b) ) ^ (a ^ b);
  39.  
  40. 	}
  41.  
  42. 	public static void main(String[] args) {
  43. 		int val1=add1(5, 6);
  44. 		int val2=add2(5, 6);
  45. 		int val3=add3(5, 6);
  46. 		int val4=add4(5, 6);
  47.  
  48. 		System.out.println(val1 + "  "+val2 + "  "+val3 + "  "+val4 + "  ");
  49.  
  50. 	}
  51. }
  52.  
Success #stdin #stdout 0.07s 380160KB
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11  11  11  11
https://ideone.com/AN5l9k
Add Numbers without '+' operator
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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