What is a good way to convert character array of varying sizes to a string? (C++)

Question

Story:
Hello, I tried to create a function in C++ that converts a character's integer value to a string, for example f('x') -> "120" and f('4') -> "52". I prefer modifying the string as an array of characters inside the function and then convert it to string before returning it, but...

Actual problem:
I somehow end up getting garbage values. The problem seems to caused by the conversion. I think it happens, because the char array-to-string conversion doesn't know the size of the character array, which can vary between 1, 2 and 3, making string assume the character array has 3 characters causing extra characters to be replaced with garbage values.

I've tried to using string.resize function to cut off the garbage values, but I have a feeling it's not a good way.

Questions:
What are good ways to convert character array of varying sizes to a string?
Is cutting garbage values off the string using string.resize function a good way to fix the problem?
Is there a way to initialize a string with a specified length?

Here is the code:
https://code.sololearn.com/clHWHfZs5flZ

Answer 1

Ipang Thanks, maybe a good alternative to the whole function, but didn't really answer to my questions.

Answer 2

Perhaps std::to_string can help (don't forget to include <string>)

string reprCharAsInt(unsigned char c)
{
return std::to_string( static_cast< int >( c ) );
}

Answer 3

FF9900
Nice, thanks! That solved much confusion and misunderstanding about null-terminators. Thought null-terminators were only needed when printing character arrays, but seems like they are also needed in to-string conversions.