explain how operands are evaluated and how the expressions d

 explain how operands are evaluated and how the expressions derive their answers, FOR EACH EXPRESSION!!!  Execute the programs in the given language and explain the results  Language : Java /******************************** * Explain how the value of each of the operands in each of  * these experssions are evaluated. **************************************/  public class ex3{     public static void main(String args[]) {          int a=2, b=3, c=4, d=0;          System.out.println(\"Before the calculation 1 \");         System.out.println(\"D= \" + d + \" a= \" + a+ \" b= \" + b                            + \" c=\" + c);          d = (a*b) - (a++) + (--c)/a;          System.out.println(\"After the calculation 1 \");         System.out.println(\"D= \" + d + \" a= \" + a +\" b= \" + b                            + \" c=\" + c);                  a=2; b=3; c=4; d=20;         System.out.println(\"Before the calculation 2 \");         System.out.println(\"D= \" + d + \" a= \" + a+ \" b= \" + b                            + \" c=\" + c);          a = b + ( c = d/ b++) + b -1;              System.out.println(\"After the calculation 2 \");         System.out.println(\"D= \" + d + \" a= \" + a +\" b= \" + b                            + \" c=\" + c);                      }// end main } 

Solution

Here is the explanation as comments.

/********************************
* Explain how the value of each of the operands in each of
* these experssions are evaluated.
**************************************/

public class OperatorPrecedence
{
public static void main(String args[])
{

int a=2, b=3, c=4, d=0;               //a = 2, b = 3, c = 4, d = 0.

System.out.println(\"Before the calculation 1 \");
System.out.println(\"D= \" + d + \" a= \" + a+ \" b= \" + b
+ \" c=\" + c);   //No modifications, so, the output is: D = 0 a = 2 b = 3 c = 4

d = (a*b) - (a++) + (--c)/a;
//d = (2*3) - (a++) + (--c) / a
// = 6 - 2 + 3 / a
// = 6 - 2 + 3 / 3
// = 6 - 2 + 1
// = 4 + 1
// = 5.
//So, after this operation: a = 3, b = 3, c = 3, d = 5.

System.out.println(\"After the calculation 1 \");
System.out.println(\"D= \" + d + \" a= \" + a +\" b= \" + b
+ \" c=\" + c);   //So the output is: D = 5 a = 3 b = 3 c = 3
  
   a=2; b=3; c=4; d=20;   //Hardcoded the values, so, a = 2, b = 3, c = 4, d = 20.
System.out.println(\"Before the calculation 2 \");
System.out.println(\"D= \" + d + \" a= \" + a+ \" b= \" + b
+ \" c=\" + c);   //No modifications, so the output is: D = 20 a = 2 b = 3 c = 4
  
   a = b + ( c = d/ b++) + b -1;  
   //a = 3 + (c = 20 / 3) + b - 1
   //a = 3 + (c = 6) + b - 1
   //a = 3 + 6 + 4 - 1
   //a = 9 + 4 - 1
   //a = 13 - 1
   //a = 12
  
System.out.println(\"After the calculation 2 \");
System.out.println(\"D= \" + d + \" a= \" + a +\" b= \" + b
+ \" c=\" + c); //So, the output is: D = 20 a = 12 b = 4 c = 6
  
}// end main
}
//So, finally, after executing the whole code, the output is:
//D = 0 a = 2 b = 3 c = 4
//D = 5 a = 3 b = 3 c = 3
//D = 20 a = 2 b = 3 c = 4
//D = 20 a = 12 b = 4 c = 6