Thread: Converting Base 10 numbers to Base 2, 8, and 16

I'm having trouble writing this program that converts base 10 (decimal) numbers to base 2(binary), base 8(octal), and base 16(hexadecimal). They conver to binary and octal using placeholder notation, however when it comes to converting to base 16/hexadecimal, the program does not read the assigned chars. if you're not familiar with hexadecimal, any number after 9 is assigned a letter (i.e. 10=A, 11=B, 12=C, etc.) it actually converts to hexadecimal, but it just doesn't convert it respectively to the letters after 9.

here's where i'm at:

Code:

#include <math.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{
      int a,
          b,
          c,
          d=-1,
          choice;
      char const A=10,
                 B=11,
                 C=12,
                 D=13,
                 E=14,
                 F=15,
                 G=16;

      char ans;

      for(;;)
      {

       printf("Type in any integer to be converted into another base: ");
       scanf("&#37;d",&a);
       printf("Select another base representation (2 or 8 or 16). \n\n2 represents "
              "binary notation\n\n8 represents octal notation\n\n16 represents hexadecimal notation");
       scanf("%d",&choice);

       switch (choice)
       {
        case 2:
             b=a;
             while (b!=0)
             {
              c=b%2;
              b/=2;
              ++d;
              printf("%d x 2^%d\n",c,d);
             }
        break;
        {
         case 8:
              b=a;
              while (b!=0)
              {
               c=b%8;
               b/=8;
               ++d;
               printf("%d x 8^%d\n",c,d);
              }
        break;
        {
         case 16:
              b=a;
              while (b!=0)
              {
               c=b%16;
               b/=16;
               ++d;
               printf("\n%d x 16^%d\n",c,d);
              }
        }
        }
       }

      printf("Do you wish to run again? (Y/N)");
      ans=getchar();
      ans=getchar();

      if (ans=='N')
         break;

      }
      printf("\n");
     
      system("PAUSE");
      return 0;
}