Answer :
Answer:
// program in java.
// package
import java.util.*;
// class definition
class Main
{
// main method of the class
public static void main (String[] args) throws java.lang.Exception
{
try{
// scanner Object to read the input
Scanner sc = new Scanner(System.in);
System.out.print("Enter Package1 Weight:");
// read the Weight of Package1
double w1 = sc.nextDouble();
// check weight is negative or not
while (w1 < 0)
{
System.out.print("weight can't be negative. Enter again:");
// read again
w1 = sc.nextDouble();
}
System.out.print("Enter Package1 Price:");
// read the Price of Package1
double p1 = sc.nextDouble();
// check price is negative or not
while (p1 < 0)
{
System.out.print("price can't be negative. Enter again:");
// read again
p1 = sc.nextDouble();
}
System.out.print("Enter Package2 Weight:");
// read the Weight of Package1
double w2 = sc.nextDouble();
// check weight is negative or not
while (w2 < 0)
{
System.out.print("weight can't be negative. Enter again:");
// read again
w2 = sc.nextDouble();
}
System.out.println("Enter Package1 Price:");
// read the Price of Package2
double p2 = sc.nextDouble();
// check price is negative or not
while (p2 < 0)
{
System.out.print("price can't be negative. Enter again:");
// read again
p2 = sc.nextDouble();
}
// check better price
if (w1 / p1 > w2 / p2)
System.out.println("package1 has better price");
else
System.out.println("package2 has better price");
}catch(Exception ex){
return;}
}
}
Explanation:
Read the weight of package1 and if weight is negative then ask again to enter the weight.Read price of package1 and if price is negative then again ask to enter price. Similarly read weight and price for package2.Then find weight1/price is greater then package 1 has better price else package2 has better price.
Output:
Enter Package1 Weight:-2
weight can't be negative. Enter again:5
Enter Package1 Price:-100
price can't be negative. Enter again:120
Enter Package2 Weight:-4
weight can't be negative. Enter again:4
Enter Package1 Price:-100
price can't be negative. Enter again:100
package1 has better price