#include <stdio.h>
main()
{
   unsigned long a=0;
   unsigned long b=0;
   int z;
    {
    printf("Enter two digits you want to add seperated by a space:");
    scanf("%u %u", a, b);
   }



z= a + b;
printf("\n%u\n", z);


}

#include <stdio.h>

main()
{
   unsigned long c=0;
   unsigned long a=0;
   unsigned long b=0;
   unsigned long z;
   unsigned long noBits = 32;
   unsigned long x = (1 << noBits - 1);
   unsigned long y = 129;
   int i;
   unsigned long k;
   unsigned long t;
   unsigned long g;
   {
    printf("Please choose a function\n Calc (1)\n Binary convertor (2)\n");
    scanf("%u", &c);
     {
    if (c == 1)
       {
        {printf("\n 1 for addition\n 2 for subtraction\n 3 for multiplication\n 4 for division\n");
        scanf("%u", &g);

          printf("\nEnter two digits seperated by a space:");
           scanf("%u %u", &a, &b);


       if (g==1)
            {z= a + b;
printf("\n%u\n", z);}
       if (g==2)
            {z=a - b;
printf("\n%u\n", z);}
       if (g==3)
            {(z= a * b);
printf("\n%u\n", z);}
       if (g==4)
            {(z= a / b);
printf("\n%u\n", z);}

                printf("\n%u\n", z);
        }
       }
       
    if (c == 2)
       {printf("Enter any whole number:");
        scanf("%d", &y);
        for (i=noBits - 1; i >= 0; i--)
  {
    printf("i = %d  ", i);
    x = 1 << i;
    k = x & y;
    if (k != 0){
      printf("binary = 1\n");
    } else {
      printf("binary = 0\n");
    }
                
  }
     }


   }
}
}