BlueJ Program On Composite Magic Number

For Details of The Program: CLICK HERE

import java.io.*;

class Str1

{

int m,n,c=0;

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

public void takeNumbers() throws Exception {

System.out.println("Enter the value of 'm';");

m=Integer.parseInt(br.readLine());

System.out.println("Enter the value of 'n';");

n=Integer.parseInt(br.readLine());

if(m >n)

{

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

return;

}

System.out.println("The composite magic numbers are "); for(;m <=n;m++)

{

if(nonPrime(m) && magic(m))

{

System.out.print(m+ " ");

c++;

}

}

System.out.println("\nFrequency of composite magic numbers:"+c);

}

private boolean nonPrime (int x)

{

int i;

for(i=2;i < x; i++)

{

if(x%i==0)

break;

}

if(i==x)

return false;

else

return true;

}

private boolean magic( int x)

{

int s=0;

while(true)

{

while(x >0)

{

s=s+x%10;

x=x/10;

}

if(s < 10 )

break;

x=s;

s=0;

}

if(s==1)

return true;

else

return false;

}

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

{

Str1 ob=new Str1();

ob.takeNumbers();

}

}

2014 Computer Practical Paper: CLICK HERE