FromLeftToRight.java

class FromLeftToRight { 
   
   // Here H stands for famous physicist WERNER HEISENBERG(1901-1976) 
   // Even Heisenberg Uncertainty Principle does not apply here!
   
   // Adding or substracting zeroH() will NOT affect your result
   // Multiplying or Dividing oneH() will NOT affect your result
   // These are the secrets of measuring your system without disturbing the system
   
   public static int zeroH(String s, int n) { 
      System.out.println(s + ": " + n);
      return 0;
   } 

   public static int oneH(String s, int n) { 
      System.out.println(s + ": " + n);
      return 1;
   } 
   
   public static void main(String arg[]) { 
      System.out.println("//*****************");

      System.out.println("int x = 0;");
      System.out.println("x = x++; ");
      int x = 0;
      
      // adding 0's will not affect the result
      // x = x++; The equivalent statment of the following
      x = zeroH("Initial", x) + x++ + zeroH("Before assignment", x); 
      
      zeroH("After assignment", x);
      
      System.out.println("//*****************");

      System.out.println("int y = 5;");
      System.out.println("y = y++ + y++;");
      int y = 5;
            
      // adding 0's will not affect the result
      //y = y++ + y++; The equivalent statment of the following
      y = zeroH("Initial", y) + y++ + zeroH("In the middle", y) + y++ + zeroH("Before assignment", y);
      
      zeroH("After assignment", y);

      System.out.println("//*****************");
      System.out.println("int z = 5;");
      System.out.println("z = z++ * z++;");
      int z = 5;
            
      // multiplying 1's will not affect the result
      //z = z++ * z++; The equivalent statment of the following
      z = oneH("Initial", z) * z++ * oneH("In the middle", z) * z++ * oneH("Before assignment", z);
      
      zeroH("After assignment", z);

      System.out.println("//*****************");
   } 
} 


// The output
//*****************
int x = 0;
x = x++; 
Initial: 0
Before assignment: 1
After assignment: 0
//*****************
int y = 5;
y = y++ + y++;
Initial: 5
In the middle: 6
Before assignment: 7
After assignment: 11
//*****************
int z = 5;
z = z++ * z++;
Initial: 5
In the middle: 6
Before assignment: 7
After assignment: 30
//*****************