#include <stdio.h>
#include <conio.h>
int num1 , num2 ;
void main ()
   {
   clrscr();
   printf ("\n enter two numbers, for exit enter negative number or zero");
   scanf (" %d %d ",&num1,&num2);
   while (num1 > 0 )
   {
   printf ("\n %d * %d= %d",num1,num2,num1*num2);
   printf ("\n %d + %d= %d",num1,num2,num1+num2);
   printf ("\n enter two numbers, for exit enter negative number or zero");
   scanf ("%d %d",&num1,&num2);
   }
   getch();
   }

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