#include <cstdio>

 #include <stdint.h>

 int8_t Myitoa(int64_t In_i64SrcNum, uint8_t In_i8Radix, char *In_pcDst)

 {

     int8_t      i8RetVal    = ;

     //这里强转是为了2、8、16进制显示的时候不需要符号

     uint64_t    ui64SrcNum  = (uint64_t)In_i64SrcNum;

     char        *pcDst      = In_pcDst;

     const char  acTable[]   = "0123456789ABCDEF";

     if (In_i8Radix <=  || pcDst == NULL)

     {

         i8RetVal = -;

         goto fun_ret;

     }

     if (ui64SrcNum == )

     {

         *(pcDst ++) = '';

         *pcDst      = ;

         goto fun_ret;

     }

     if ((int64_t)ui64SrcNum <  && In_i8Radix == )

     {

         ui64SrcNum   = ~ui64SrcNum + ;

         *(pcDst ++) = '-';

     }

     do //do...while循环的效率较高

     {

         *(pcDst ++) = acTable[ui64SrcNum % In_i8Radix];

         ui64SrcNum   /= In_i8Radix;

     } while (ui64SrcNum);

     *pcDst = ;

     pcDst --;

     In_pcDst = *In_pcDst == '-' ? In_pcDst +  : In_pcDst;

     do

     {

         char cTmp   = *In_pcDst;

         *In_pcDst   = *pcDst;

         *pcDst      = cTmp;

         In_pcDst ++;

         pcDst --;

     } while (In_pcDst < pcDst);

 fun_ret:

     return i8RetVal;

 }

 void main()

 {

     int64_t i64Test = -;

     char    acBinStr[] = {};

     char    acOctStr[] = {};

     char    acDecStr[] = {};

     char    acHexStr[] = {};

     Myitoa(i64Test, , acBinStr);

     Myitoa(i64Test, , acOctStr);

     Myitoa(i64Test, , acDecStr);

     Myitoa(i64Test, , acHexStr);

     printf("%s\n%s\n%s\n%s\n", acBinStr, acOctStr, acDecStr, acHexStr);

     return;

 }