Question

I have this but there is an error, I don’t get it :(. I’m relatively new to Java.

package hw; import java.util.Scanner;  public class Problem1 {     public static void main (String [] args)     {         int cost; int number; double cost_unit; double total;          Scanner entrada = new Scanner(System.in);                      System.out.println('Please enter the cost of the product.');         cost = entrada.nextInt();          while (cost>0){              System.out.println('Please enter the amount of units to be sold');             number = entrada.nextInt();              if (number>0);              cost_unit = cost * 1.4;             total = cost_unit*number;              System.out.printf('Cost per unit will be $ %d\n',cost_unit);             System.out.printf('Cost per unit will be $ %d\n',total);                                         }     }                 } 

// I just want the user to enter the cost for a product, give a number of units to be ordered, and I want the program find out the final price of the product with a 40% profit.

Answer 1

In printf, %d is for a signed decimal integer, whereas cost_unit and total are doubles. You should use %f instead.

System.out.printf('Cost per unit will be $ %f\n',cost_unit); System.out.printf('Cost per unit will be $ %f\n',total);