c++ 十六进制字符串转换二进制字符串， 二进制在转换十进制

#include <stdio.h>;
#include <string.h>;
#include <stdlib.h>;

/*
*        10进制字符转成16进制字符
*/
int strDec2Hex(char* sDec, int iDecLen, char* sHex, int iHexLen)
{
	char sSrc[65];
	char sForamt[6];
	unsigned long ulSrc;
	memset(sSrc, 0, sizeof(sSrc));
	memcpy(sSrc, sDec, iDecLen);
	ulSrc = atol(sSrc);
	sprintf(sForamt, "%%0%dX", iHexLen);
	_snprintf(sHex, iHexLen, sForamt, ulSrc);
	return ulSrc;
}
/*
*        2进制字符转成16进制字符
*/
int strBin2Hex(char* sBin, int iBinLen, char* sHex, int iHexLen)
{
	char sSrc[65];
	char sForamt[6];
	unsigned long ulSrc;
	memset(sSrc, 0, sizeof(sSrc));
	memcpy(sSrc, sBin, iBinLen);
	*(sSrc + 0) == '1' ? ulSrc = 1 : ulSrc = 0;
	for (int i = 1; i < iBinLen; i++)
		*(sSrc + i) == '1' ? ulSrc = ulSrc * 2 + 1 : ulSrc = ulSrc * 2 + 0;
	sprintf(sForamt, "%%0%dX", iHexLen);
	_snprintf(sHex, iHexLen, sForamt, ulSrc);
	return ulSrc;
}