Help with Java Loops

[IvanSnipedYu]

I'm trying to make the second loop go back to the first one. I'm not sure why my code didn't work but do you guys have any suggestions?

import java.util.Scanner;
public class HW05P05 {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		
		
	int x = 0;
	int choice;
	
	do{
		System.out.println("Binary Number Converter");
		System.out.println("1. Convert Binary to Decimal");
		System.out.println("2. Convert Decimal to Binary");
		System.out.println("3. Exit the Program");
		System.out.print("Enter your choice (1-3): ");
		choice = input.nextInt();
		if (choice > 3 || choice < 1){
			System.out.println("");
			System.out.println("Sorry that's not an option");
			System.out.println("");
			x--;
		}
		else if (choice == 3){
			System.out.println("Bye!");
			System.exit(0);
		}
		x++;
	}while(x == 0 || choice > 3 || choice < 1);
	
	String empty = input.nextLine();
	
	double sum = 0;
	int i;
	do{
		System.out.println("Enter Binary: ");
		String binary = input.nextLine();
		int length = binary.length();
		int length2 = binary.length();
		for (i = 0; i < length; i++){
			char check = binary.charAt(i);
			if (check == '1'){
				sum = sum + Math.pow(2,length-1-i);
			}
				
}
		System.out.printf("Decimal: %.0f", sum);
		x--;
	}while(x == 1);
	
	
	

	}

}

 

[Stardar1]

3 minutes ago, IvanSnipedYu said:

I'm trying to make the second loop go back to the first one. I'm not sure why my code didn't work but do you guys have any suggestions?

Spoiler

import java.util.Scanner;
public class HW05P05 {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		
		
	int x = 0;
	int choice;
	
	do{
		System.out.println("Binary Number Converter");
		System.out.println("1. Convert Binary to Decimal");
		System.out.println("2. Convert Decimal to Binary");
		System.out.println("3. Exit the Program");
		System.out.print("Enter your choice (1-3): ");
		choice = input.nextInt();
		if (choice > 3 || choice < 1){
			System.out.println("");
			System.out.println("Sorry that's not an option");
			System.out.println("");
			x--;
		}
		else if (choice == 3){
			System.out.println("Bye!");
			System.exit(0);
		}
		x++;
	}while(x == 0 || choice > 3 || choice < 1);
	
	String empty = input.nextLine();
	
	double sum = 0;
	int i;
	do{
		System.out.println("Enter Binary: ");
		String binary = input.nextLine();
		int length = binary.length();
		int length2 = binary.length();
		for (i = 0; i < length; i++){
			char check = binary.charAt(i);
			if (check == '1'){
				sum = sum + Math.pow(2,length-1-i);
			}
				
}
		System.out.printf("Decimal: %.0f", sum);
		x--;
	}while(x == 1);
	
	
	

	}

}

 

 

Just to be clear, you want the second do-while loop to end up at the top of the first?

 

Just put them both inside a while loop. 

[IvanSnipedYu]

5 minutes ago, Stardar1 said:

Just to be clear, you want the second do-while loop to end up at the top of the first?

 

Just put them both inside a while loop. 

yes.

I tried something like this
but it didn't work because the second time i try to access the binary -> decimal converter it gives me a 0. Instead of asking for a new binary input.

Quote

import java.util.Scanner;

public class HW05P05 {

 

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

 

 

int x = 0;

int choice;

 

do{

System.out.println("Binary Number Converter");

System.out.println("1. Convert Binary to Decimal");

System.out.println("2. Convert Decimal to Binary");

System.out.println("3. Exit the Program");

System.out.print("Enter your choice (1-3): ");

choice = input.nextInt();

if (choice > 3 || choice < 1){

System.out.println("");

System.out.println("Sorry that's not an option");

System.out.println("");

x--;

}

else if (choice == 3){

System.out.println("Bye!");

System.exit(0);

}

x++;

}while(x == 0 || choice > 3 || choice < 1);

 

String empty = input.nextLine();

 

int i;

do{

double sum = 0;

System.out.println("Enter Binary: ");

String binary = input.nextLine();

int length = binary.length();

for (i = 0; i < length; i++){

char check = binary.charAt(i);

if (check == '1'){

sum = sum + Math.pow(2,length-1-i);

}

 

}

System.out.printf("Decimal: %.0f", sum);

x--;

System.out.println("");

System.out.println("");

do{

System.out.println("Binary Number Converter");

System.out.println("1. Convert Binary to Decimal");

System.out.println("2. Convert Decimal to Binary");

System.out.println("3. Exit the Program");

System.out.print("Enter your choice (1-3): ");

choice = input.nextInt();

if (choice > 3 || choice < 1){

System.out.println("");

System.out.println("Sorry that's not an option");

System.out.println("");

x--;

}

else if (choice == 3){

System.out.println("Bye!");

System.exit(0);

}

x++;

}while(x == 0 || choice > 3 || choice < 1);

}while(choice == 1);

 

 

 

 

}

 

}