二进制值和十六进制字符串相互转换的C++代码

来源：互联网发布：知乎自媒体平台编辑：程序博客网时间：2024/05/19 19:41
#include <iostream>#include <string>#include <stdint.h>using namespace std;string BinToHex(const string &strBin, bool bIsUpper = false){    string strHex;    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;}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;}int main(){    string strBin = "!@#$%^&*()_+~`1234567890-=";    string strHex = "21402324255E262A28295F2B7E60313233343536373839302D3D";    string strBinToHex = BinToHex(strBin);    cout << strBinToHex << endl;    strBinToHex = BinToHex(strBin, true);    cout << strBinToHex << endl;    string strHexToBin = HexToBin(strHex);    cout << strHexToBin << endl;    return 0;}
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