Question

wap to enter three numbers and exchange them with the fourth variable in java
No Scaming ​

Answer 1

$\texttt{\textsf{\large{\underline{Solution}:}}}$

The given co‎de is written in Java.

import java.util.*;

public class SwapValues{

   public static void main(String s[]){

       int a,b,c,d;

       Scanner sc=new Scanner(System.in);

       System.out.print("Enter first number: ");

       a=sc.nextInt();

       System.out.print("Enter second number: ");

       b=sc.nextInt();

       System.out.print("Enter third number: ");

       c=sc.nextInt();

       sc.close();

       System.out.println("\nBefore Swapping: ");

       System.out.println("a = "+a);

       System.out.println("b = "+b);

       System.out.println("c = "+c);

       d=a;

       a=c;

       c=b;

       b=d;

       System.out.println("\nAfter Swapping: ");

       System.out.println("a = "+a);

       System.out.println("b = "+b);

       System.out.println("c = "+c);

   }

}

$\texttt{\textsf{\large{\underline{Explanation}:}}}$

• Here, we have to swap values of three variables a,b and c. After swapping, b stores the value of a, c stores the value of b and a stores the value of c.
• To solve this, we have to use fourth variable.
• At first, we have to store value of a in d so as to access it later.
• Now, a stores the value of c, c stores the value of b.
• Now, we have to store the value of a in b. But a is overwritten. So now, we will store the value of d in b. Hence, the values are swapped.

See the attachment for output.