How to append a byte to a string

[cmdcenter]

How can I append a byte to a string?

string s = "test";
unsigned char b = 0xff;

I want to append b to s

[firedraco]

You know unsigned/signed char are exactly the same except for output? Just cast it to a char*, append the stuff, then cast it back to an unsigned char* if you really need an unsigned char*.

[cmdcenter]

So do you think this is ok?

typedef unsigned char Byte;

    string test = "test";
    Byte bytes[2] = {0xf5, 0xf3};
    test.append((const char*)bytes, 2);
    printf("%x\n", (Byte)test[4]); // prints f5

I just thought if I cast bytes to char* I would lose the most significant bit of each Byte :)

[firedraco]

All unsigned chars do is tell the compiler to treat it like an unsigned and ignore 2s compliment rules. So for example:

11111111 = 255 if in an unsigned char
11111111 = -127 if in a signed char

I don't see any reason why it shouldn't.