Make the following changes to the SellStocks program: (a) Add a loop so that, af

Question

Make the following changes to the SellStocks program:

(a) Add a loop so that, after displaying the net proceeds, the program will ask the user for another stock price, number of shares, and commission rate. The process will repeat indefinitely until the user enters zero as the stock price.

(b) Have the program put two digits after the decimal point when displaying dollar amounts. (The original program would display $10.5 instead of $10.50.)

Here is the source code:
// Please include single line comments with explanation next to where you made //changes

import java.util.*;

public class SellStocks {
public static void main (String [] args) {
Scanner in=new Scanner (System.in);
double price,rate,value,comm,net;
int shares;
System.out.print ("Enter stock price:");
price=in.nextDouble ();
System.out.print ("Enter number of shares:");
shares=in.nextInt ();
value=price*shares;
value=Math.round (value*100);
value/=100;
System.out.println ("Value of shares: $"+value);
System.out.print ("Enter commission rate (as a percentage): ");
rate=in.nextDouble ();
comm=value*(rate/100.);
comm=Math.round (comm*100);
comm/=100;
System.out.println ("Commission: $"+comm);
net=value-comm;
net=Math.round (net*100);
net/=100;
System.out.println ("Net proceeds: $"+net);
}
}

Explanation / Answer

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import java.util.*;

public class SellStocks {
public static void main (String [] args) {
Scanner in=new Scanner (System.in);
double price,rate,value,comm,net;
int shares;
System.out.print ("Enter stock price(0 to exit):"); //add to prompt
price=in.nextDouble ();
while(price!=0)       //keep going?
   {System.out.print ("Enter number of shares:");
    shares=in.nextInt ();
    value=price*shares;
    value=Math.round (value*100);
    value/=100;
    System.out.println ("Value of shares: $"+value);
    System.out.print ("Enter commission rate (as a percentage): ");
    rate=in.nextDouble ();
    comm=value*(rate/100.);
    comm=Math.round (comm*100);
    comm/=100;
    System.out.printf ("Commission: $%.2f ",comm); //use printf for 2 decimal
    net=value-comm;
    net=Math.round (net*100);
    net/=100;
    System.out.printf("Net proceeds: $%.2f ",net); //use printf for 2 decimal
    System.out.print ("Enter stock price(0 to exit):"); //add to prompt
   price=in.nextDouble ();   //get next price
    }

}
}

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