high school java user

[PvtBillPilgrim]

Hi. I'm completely new to Java, but I'm taking a course at a local university. I was wondering if someone could help me with this.

I need to create a program that counts change (pennies, nickels, dimes, quarters).

I've only been taking the class for about a week and am still very inexperienced when it comes to programming (and more importantly spotting errors). I modeled this program after a very similar one in my textbook. However, I cannot compile it using Dr. Java. Would someone mind helping me with some of the syntax errors I have made? Any help would be appreciated.


import java.util.Scann er;

public class CoinCounter {

public static void main(String[] args) {

// we define the variables that we need for our calculations
int quarters = 0, dimes = 0.0;
int nickels = 0; pennies = 0;
int total, num;

// we read in the values
Scanner scan = new Scanner(System. in);

System.out.prin tln("How many quarters do you have:");
int quarters = scan.nextInt();
System.out.prin tln("How many dimes do you have:");
dimes = scan.nextInt();
System.out.prin tln("How many nickels do you have:");
nickels = scan.nextInt();
System.out.prin tln("How many pennies do you have:");
pennies = scan.nextDouble ();

// we perform the calculations
quarters + dimes + nickels + pennies = num;

total = 25 * quarters;
total = total + 10 * dimes;
total = nickels * 5 + total;
total = total + pennies;

// print the result
System.out.prin tln("The number of coins you have is "
+ num);
System.out.prin tln("And they are worth in cents: " total);
}
}

[Ganon11]

Three errors I see:

1) In declaring your variables, the first line you say int quarters = 0, dimes = 0.0; This 0.0 is technically a double value (because of the decimal) and your compiler may complain about that.

2) The next line of declaring variables, you write int nickels = 0; pennies = 0; - should the first ; be a , instead? As it is, you are trying to execute the statement pennies = 0, which doesn't work, since pennies has not been defined.

3) When reading into pennies, you use scan.nextDouble () - but pennies should be an int. Use .nextInt() like the rest of the variables.

[PvtBillPilgrim]

Thank you very much. I'll try and compile it again.

[PvtBillPilgrim]

OK. I made 4 changes.
I changed the dimes to just 0
I changed the ; after nickels = 0 to ,
I changed the scan.nextDouble for pennies to scan.nextInt
I changed quarters + dimes + nickels + pennies = num; to num = quarters + dimes + nickels + pennies;

I still get the following compiler error however:
Line 35 "System.out.pri ntln("And they are worth in cents: " total);
Error: ')' expected
Could someone explain?


import java.util.Scann er;

public class CoinCounter {

public static void main(String[] args) {

// we define the variables that we need for our calculations
int quarters = 0, dimes = 0;
int nickels = 0, pennies = 0;
int total, num;

// we read in the values
Scanner scan = new Scanner(System. in);

System.out.prin tln("How many quarters do you have:");
int quarters = scan.nextInt();
System.out.prin tln("How many dimes do you have:");
dimes = scan.nextInt();
System.out.prin tln("How many nickels do you have:");
nickels = scan.nextInt();
System.out.prin tln("How many pennies do you have:");
pennies = scan.nextInt();

// we perform the calculations
num = quarters + dimes + nickels + pennies;

total = 25 * quarters;
total = total + 10 * dimes;
total = nickels * 5 + total;
total = total + pennies;

// print the result
System.out.prin tln("The number of coins you have is "
+ num);
System.out.prin tln("And they are worth in cents: " total);
}
}

[Ganon11]

In order to give two different types of information to the System.out.prin tln() function, you need to use the '+' operator e.g.

System.out.println("You have " + myIntVariable + " puppies.");