BlueJ Program on ISBN

For Details of The Program: CLICK HERE

import java.io.*;

class Prog1

{

BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); String str;

int digit,c=1,x=0,i,len;

char ch;

public void show()throws Exception

{

System.out.println("Enter the ISBN code:");

str=br.readLine();

len=str.length();

if(len!=10)

{

System.out.println("Invalid input.");

return;

}

for(i=len-1;i >=0;i--)

{

ch=str.charAt(i);

if(ch=='X')

digit=10;

else

digit=ch-48;

x=x+digit*c;

c++;

}

System.out.println("\nSum="+x);

if(x%11==0)

System.out.println("Leaves no remainder - valid ISBN code."); else

System.out.println("Leaves remainder - invalid ISBN code.");

}

public static void main(String args[]) throws Exception

{

Prog1 ob=new Prog1();

ob.show();

}

}

2013 Computer Practical Paper: CLICK HERE