Hex string Convert to binary string and Vise-versa (16 binary and 2 binary string conversions)

This conversion in our daily coding still have a chance to meet, and here to share with you to discuss.

void Pu_hex_to_binary (std::string strhex, std::string &strbinaryresult) {for (int i = 0; i < strhex.size (); + +        i) {char chtemp = strhex[i];        int chhexvalue;        if (' F ' >= chtemp && chtemp >= ' a ') Chhexvalue = chtemp-' a ' + 10;        else if (' F ' >= chtemp && chtemp >= ' a ') Chhexvalue = chtemp-' a ' + 10;        else Chhexvalue = chtemp-' 0 ';        Std::string strbinary;        char ibit = 4;            while (Ibit > 0) {if (chhexvalue% 2 = = 0) strbinary.push_back (' 0 ');            else Strbinary.push_back (' 1 ');            if (Chhexvalue > 0) chhexvalue >>= 1;        --ibit;        } std::reverse (Strbinary.begin (), Strbinary.end ());    Strbinaryresult.append (strbinary);    }}void Pu_binary_to_hex (std::string strbinary, std::string &strhex) {int chhexvalue = 0;    Strhex.clear (); for (int i= 0; I < strbinary.size ();        ) {std::string strsubbinary;            if (strbinary.size ()-I >= 4) {strsubbinary = Strbinary.substr (i, 4);        i + = 4;            } else {strsubbinary = Strbinary.substr (i);        i = Strbinary.size ();        } std::reverse (Strsubbinary.begin (), Strsubbinary.end ());        Chhexvalue = 0;            for (int j = 0; J < strsubbinary.size (); ++j) {char chtemp = strsubbinary [j];            Char chbinaryvalue = chtemp-' 0 ';           if (chbinaryvalue% 2 = = 1) chhexvalue + = 1 << j;        } if (Chhexvalue <) strhex.push_back (Chhexvalue + ' 0 ');    else Strhex.push_back (chHexValue-10 + ' A '); }}

　　

Hex string Convert to binary string and Vise-versa (16 binary and 2 binary string conversions)