b_t_d_and_d_t_b_2_4_3.java

//problelm 2.4.2
        //b_t_d_and_d_t_b_2_4_3.java: write a program that dose binary to decimal and decimal to binary 
import java.util.Scanner;
class b_t_d_and_d_t_b_2_4_3
{
    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the binary number: ");
         int binar = sc.nextInt();
        // System.out.println("Enter the decimal number: ");
        // int decimal = sc.nextInt();
        int bino = binar;
        int base = 1, num,rem, decino =0;
        while(bino > 0)
        {
            rem = bino % 10;
            decino = decino + rem*base ;
            bino = bino/10;
            base =  base *2;
        }
        System.out.println("Binary number is "+binar+"and \n Decimal number is "+decino);

    // decimal to binary
        System.out.println("\n\nEnter the decimal number: ");
        int decimal = sc.nextInt();
        int i =0 , deci;
        int binary[] = new int[16];
        deci = decimal;
        while(deci > 0)
        {
            binary[i++] = deci%2;
            deci = deci/2;
        }
        System.out.println("Decimal number is "+decimal+"and \n Binary number is ");
        for( i = i-1 ; i >= 0; i-- )
        {
            System.out.print(binary[i]);
        }

    }
}