Intro: Consider that I have no experience with C++, but can find my way around any language to do basic tasks. Most of my experience is with .net languages (vn.net and C#), php and js, so please explain as if you were teaching a complete noob.
Here is the problem: I receive data in an unsigned char characters[12]; and I have to then append that data to a std::string
data is always 12 characters long, and is not null terminated, because it is gathered by selecting specific bytes received from serial port.
Long story short:
std::string stroutput = "some text ";
unsigned char characters[12];
characters[0]=64; //demo data to shorten the code
characters[1]=72;
stroutput.append(characters[0]);
stroutput.append(characters[1]);
....
The result i want is to have the string value
some text @H...
But what i get is an error while compiling
error: invalid conversion from ‘unsigned char’ to ‘const char*’ [-fpermissive]
stroutput.append(characters[0]);
~~~~~~~~~~~~^
Logic behind this thinking is that output of:
printf("%c%c",characters[0],characters[1]);
and
std::cout << characters[0] << characters[0] << std::endl;
results in
@H
So: How do I convert unsigned char something[12] to std::string?
Thanks
Edit: Sorry for the duplicate, search didn't return that question. Thanks everyone - too bad I can't mark multiple answers!
To append a character you have to use the following overloaded method append
basic_string& append(size_type n, charT c);
For example
stroutput.append(1, characters[0]);
stroutput.append(1, characters[1]);
Otherwise use method push_back or the operator +=. For example
stroutput += characters[0];
stroutput += characters[1];
If you want to append the whole array or its part then you can write
stroutput.append( reinterpret_cast<char *>( characters ), sizeof( characters ) );
stroutput.append( reinterpret_cast<char *>( characters ), n );
where n is the number of characters of the array to append.