Thread: Write a currency converter class program

What have you tried so far?
Do you have any specific questions about the program?

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Hello Norm,

Sorry i didn't mean to but I'm pretty much stuck with this one for a few days. I have completed the other 5 questions but don't even know where or how to start this one. I just have a sample code which I don't know how to modify.

--- Update ---

The one code that is working is the one below

import java.util.*;
import java.text.DecimalFormat;
 
public class CurrencyConverter {
 
	public static void main(String[] args) {
 
		double amount, dollar, code, ringgit ;
 
		DecimalFormat f = new DecimalFormat("##.##");
 
		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
 
		System.out.println("USD & MYR Currency Conventer");
 
		System.out.println("Which currency You want to Convert ? ");
 
		System.out.println("1:Dollar \t2:Ringgit ");
		code = sc.nextInt();
 
		System.out.println("How much Money you want to convert ?");
		amount = sc.nextFloat();
 
		// For amounts Conversion
		if (code == 1) {
 
			// For Dollar Conversion
 
			ringgit = amount * 4.17;
			System.out.println("Your " + amount + " Dollar is : " + f.format(ringgit) + " ringgit");
 
		} else if (code == 2) {
			// For Dollar Conversion
 
			ringgit = amount * 4.17;
			System.out.println("Your " + amount + " Dollar is : " + f.format(ringgit) + " ringgit");
 
 
		} else {
			System.out.println("Invalid input");
		}
 
		System.out.println("Thank you");
	}
 
}

The one code that is working is the one below

Sorry, I don't understand what your questions are about that code.

Let's do it a few items at a time. Make the changes, compile and execute for test.
When that code works, move to the next items.

Attribute : exchangeRate -Exchange rate to convert a US Dollar to ringgit

I assume that refers to the 4.17 number that is hard coded in the program.
Add a variable to the class that holds the rate and use that variable in the computations instead of the hard coded 4.17

Constructor: to set the initial value for the attribute

Add a constructor to the class that has the exchange rate as its argument. Have the constructor save that value in the variable mentioned above.

Adding these 3 lines immediately after the "public static void main..." statement will give the class a constructor that can be modified as needed:

      new CurrencyConverter();                     //  ADDED these 3 lines
   }  // end main()
   public CurrencyConverter() {

Is this the same problem: https://coderanch.com/t/753313/java/...r-Java-program