C++: Outputting a string as hexadecimal characters…

… is easy with the boost format library:

Digging the net for examples was not very productive, so I started my own approach:

The trick is the “%x” which will output the numerical value (uint)s[i] as hexadecimal value.

If you have to deal with non printable characters, you might want to leave out the “<< s[i]” part, as it might mess up your screen output.

#include <boost/format.hpp>
.
.
.
string s="luan78zao";
cout<<"Length: "<<s.length()<<endl;

cout<<"0x"<<endl;
            
for (uint i=0; i<s.length(); i++)
   {                
   cout<< i << " " << s[i] <<" "<< boost::format ("%x") % (uint)s[i] <<endl;  
   };

Output:

string2hex

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