Question

how to add class in c++

Answer 1

did u u mean how to write a new class or use an already class of c++.
followiing i have created a class A

class A

{

   public:

      A()

      {

      }

    ~A()

      {

      }

}

Answer 2

#include <stdio.h>

int main()
{
    int r,i;
   printf("enter rows r:");
   scanf("%d",&r);
   for(i=1;i<=r;i++)
   {
     if(i%2==1)
     {
       printf("%d%d%d%d\n",i,i,i,i+1);
       }
     else
      { printf("%d%d%d%d\n",i+1,i,i,i);
       }
   }
return 0;
}