Design a cashier change maker that will take as input: a floating point value. Value: "change due" and will convert it to proper currency (from \$20 down to pennies) amounts to be handed as change to the customer

i am not sure how to use the rounding correctly every time i enter a new amount it does not work

``````import java.util.Scanner;
public class cashier
{
public static void main(String [] args)
{
Scanner kbd = new Scanner(System.in);
float bill_20;
float bill_10;
float bill_5;
float bill_1;
float quarters;
float dimes;
float nickels;
float pennies;
float change_Due;

System.out.println("How much money do you have ");
change_Due = kbd.nextFloat();

bill_20 = change_Due / 20f;
change_Due = change_Due % 20f;

bill_10 = change_Due / 10f;
change_Due = change_Due % 10f;

bill_5 = change_Due / 5f;
change_Due = change_Due % 5f;

bill_1 = change_Due / 1f;
change_Due = change_Due % 1f;

quarters = change_Due / 0.25f;
change_Due = change_Due % 0.25f;

dimes = change_Due / 0.10f;
change_Due = change_Due % 0.10f;

nickels = change_Due / 0.05f;
change_Due = change_Due % 0.05f;

pennies = change_Due / 0.01f;
change_Due = change_Due % 0.01f;

System.out.printf("\$20 bill: %1.0f\n",  bill_20);
System.out.printf("\$10 bill: %1.0f\n", bill_10);
System.out.printf("\$5 bill: %1.0f\n" , bill_5 );
System.out.printf("\$1 bill: %1.0f\n" , bill_1 );
System.out.printf("quarter: %1.0f\n" , quarters);
System.out.printf("dimes: %1.0f\n" , dimes);
System.out.printf("nickels: %1.0f\n" , nickels);
System.out.printf("pennies: %1.0f\n" , pennies);

}
}``````

## All 7 Replies

Consider that bills and coins are not fractional. They are whole integers.

Consider that bills and coins are not fractional. They are whole integers.

okay how about if the input was \$32.17
the output should be:
1 20 bill
1 10 bill
0 5 bill
2 1 bill
0 quarters
1 dime
1 nickel
2 pennies

but when i do this this is what i get
2 20 bill
1 10 bill
0 5 bill
1 quarter
2 dimes
1 nickel
2 pennies

And the reason is that bills and coins are integer quantities - not floats. Treat them as such.

And the reason is that bills and coins are integer quantities - not floats. Treat them as such.

in this program my teacher wanted us to use float and this code was the closest i came to but i can not get it to work correctly. Besides changing the type of data is there another way to do this program with float?

Unless you're allowed to use the Math.floor() function, which seems unlikely, you need to keep only the integer portion of your divisions.

In your case of 32/20, you can't use the 0.608 portion, you can only return 1 bill. You can't round it because then you're giving back too much. You must discard the decimal portion of that calculation.

how do you discard the decimal portion with my program?

i figured it out

``````import java.util.Scanner;
public class cashier
{
public static void main(String [] args)
{
Scanner kbd = new Scanner(System.in);
float bill_20;
float bill_10;
float bill_5;
float bill_1;
float quarters;
float dimes;
float nickels;
float pennies;
float change_Due;

System.out.println("How much money do you have ");
change_Due = kbd.nextFloat();

bill_20 = change_Due / 20f;
change_Due = change_Due % 20f;
bill_20 = (int)Math.round(bill_20 * 1000) / 1000;

bill_10 = change_Due / 10f;
change_Due = change_Due % 10f;
bill_10 =(int)Math.round(bill_10 * 1000)/1000;

bill_5 = change_Due / 5f;
change_Due = change_Due % 5f;
bill_5 =(int)Math.round(bill_5 * 1000)/1000;

bill_1 = change_Due / 1f;
change_Due = change_Due % 1f;
bill_1 =(int)Math.round(bill_1 * 1000)/1000;

quarters = change_Due / 0.25f;
change_Due = change_Due % 0.25f;
quarters =(int)Math.round(quarters * 1000)/1000;

dimes = change_Due / 0.10f;
change_Due = change_Due % 0.10f;
dimes =(int)Math.round(dimes * 1000)/1000;

nickels = change_Due / 0.05f;
change_Due = change_Due % 0.05f;
nickels =(int)Math.round(nickels * 1000)/1000;

pennies = change_Due / 0.01f;
change_Due = change_Due % 0.01f;
pennies =(int)Math.round(pennies * 1000)/1000;

System.out.printf("\$20 bill: %1.0f\n",  bill_20);
System.out.printf("\$10 bill: %1.0f\n", bill_10);
System.out.printf("\$5 bill: %1.0f\n" , bill_5 );
System.out.printf("\$1 bill: %1.0f\n" , bill_1 );
System.out.printf("quarter: %1.0f\n" , quarters);
System.out.printf("dimes: %1.0f\n" , dimes);
System.out.printf("nickels: %1.0f\n" , nickels);
System.out.printf("pennies: %1.0f\n" , pennies);

}
}``````
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