Write A program to input two number and check whether its is Twisted Twin Prime Number or not?

Q: Write A program to input two number and check whether its is Twisted Twin Prime Number or not?

Explanation : Two Number said to be twisted twin prime number if gap between given number is 2 and Prime, Reverse prime

Ex :  11-13

Solution :

/*   ################################

     Girfa Student Help

     Twisted Twin Prime number

     (11-13=11-31)

     for more visit : http://girfahelp.blogspot.in/p/c-language.html

     ##########################

######

*/

#include<stdio.h>

#include<conio.h>

int prime(int);

int rev(int);

void main()

{

     int n1,n2;

     clrscr();

     printf("Enter Two Number>> ");

     scanf("%d%d",&n1,&n2);

     if((n2-n1==2) && prime(n1) && prime(n2) && prime(rev(n1)) && prime(rev(n2)))

     {

           printf("\nGiven Numbers are Twisted Twin Prime");

     }

     else

           printf("Input is not Twisted Twin Prime Number");

     getch();

}

/* Check whether provided number is prime or not */

int prime(int n)

{

     int b;

     for(b=2;b<n;b++)

     {

           if(n%b==0)

                break;

     }

     if(b==n)

           return(1);

     else

           return(0);

}

int rev(int n)

{

     int r,sum=0;

     while(n>0)

     {

           r=n%10;

           sum=sum*10+r;

           n=n/10;

     }

     printf("\n\t%d\n",sum);

       getch();

     return(sum);

}

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