Zelaron Gaming Forum - binary to decimal

I need some help I need to write a program that a user inputs a string of 32 0's and 1's representing a binary number. then I need to convert the binary integer to its base 10 representation and then back.

Code:

#include <stdio.h>

#include <stdlib.h>

#include <string.h>





long     BinaryToDecimal(const char * pstrBinary)

{

     int     intLoop=0;

     long     lngReturn=0L;

     long     lngMultip=1L;

     for (intLoop=0; intLoop < (int)strlen(pstrBinary); intLoop++)

          {

          if ('1' == pstrBinary[intLoop])

            {

             lngReturn += lngMultip;

            }

          lngMultip *= 2;

          }

     return lngReturn;

}





char     *     DecimalToBinary(long lngDecimal)

{

     static     char strReturn[128]={0};

     _ltoa(lngDecimal, strReturn, 2);

     return strReturn;

}





int main(void)

{

     long          lngDecimal     =     7;

     char     *     pstrBinary     =     "111";

     printf("B2D=%ld\nD2B=%s\n", BinaryToDecimal(pstrBinary),DecimalToBinary(lngDecimal));

}