二进制和十六进制字符串相互转换的C++代码

#include <iostream>
#include <string>
#include <stdint.h>
using namespace std;
//二进制转十六进制
string BinToHex(const string &strBin)
{
    string strHex;
    bool bIsUpper = false;
    strHex.resize(strBin.size() * 2);
    for (size_t i = 0; i < strBin.size(); i++)
    {
        uint8_t cTemp = strBin[i];
        for (size_t j = 0; j < 2; j++)
        {
            uint8_t cCur = (cTemp & 0x0f);
            if (cCur < 10)
            {
                cCur += '0';
            }
            else
            {
                cCur += ((bIsUpper ? 'A' : 'a') - 10);
            }
            strHex[2 * i + 1 - j] = cCur;
            cTemp >>= 4;
        }
        return strHex;
    }
}
//十六进制转二进制
string HexToBin(const string &strHex)
{
    if (strHex.size() % 2 != 0)
    {
        return "";
    }
    string strBin;
    strBin.resize(strHex.size() / 2);
    for (size_t i = 0; i < strBin.size(); i++)
    {
        uint8_t cTemp = 0;
        for (size_t j = 0; j < 2; j++)
        {
            char cCur = strHex[2 * i + j];
            if (cCur >= '0' && cCur <= '9')
            {
                cTemp = (cTemp << 4) + (cCur - '0');
            }
            else if (cCur >= 'a' && cCur <= 'f')
            {
                cTemp = (cTemp << 4) + (cCur - 'a' + 10);
            }
            else if (cCur >= 'A' && cCur <= 'F')
            {
                cTemp = (cTemp << 4) + (cCur - 'A' + 10);
            }
            else
            {
                return "";
            }
        }
        strBin[i] = cTemp;
    }
    return strBin;
}
}