[C++]把兩個char合併成一個char

 

測試環境:mfc 2019 

使用方式

unsigned char buff[2] = { '9','E' };

unsigned char ucResult = '0';

ucResult = catChar2Hex(buff[0], buff[1]);

CString cst;

cst.Format(L"%x", int(ucResult));

MessageBox(cst);

       結果: 0x9E

參考:https://blog.csdn.net/yhxxhy978/article/details/94136796

    unsigned char catChar2Hex(unsigned char hByte, unsigned char lByte)

    {

        unsigned char ucTmp = 0x00;

        unsigned char high, low;

        if (hByte >= 'A' && hByte <= 'F')

            high = hByte - 'A' + 10;

        else if (hByte >= 'a' && hByte <= 'f')

            high = hByte - 'a' + 10;

        else if (hByte >= '0' && hByte <= '9')

            high = hByte - '0';

        else

            ucTmp = 0xff;

        if (lByte >= 'A' && lByte <= 'F')

            low = lByte - 'A' + 10;

        else if (lByte >= 'a' && lByte <= 'f')

            low = lByte - 'a' + 10;

        else if (lByte >= '0' && lByte <= '9')

            low = lByte - '0';

        else

            ucTmp = 0xff;

        ucTmp = (high << 4) | (low << 0);

        return ucTmp;

    }