Thread: Add data onto string.

You have to call strcat twice.

> is this possible in C.
No.

I'm not sure if you can in C++, even if you could it would just be the dot operator overloaded.

Perhaps you want sprintf() ?

Code:

sprintf(output, "%s%s%s", output, temp, "blah blah");

Or your own strcat_lots(), for EXAMPLE:

Code:

void strcat_lots(char * destination, ...)
{
    char * value = NULL;
    va_list vl;

    va_start(vl, destination);

    while((value = va_arg(vl, char *)) != NULL)
    {
        strcat(destination, value);
    }
    va_end(vl);
}

Code:

strcat_lots(output, temp, "blah blah", NULL);

I'm not sure if you can in C++, even if you could it would just be the dot operator overloaded.

The dot operator cannot be overloaded in C++. In any case, it is already possible in C++, e.g., by the operator+ overload for std::string.

Just shows I know nothing about C++

Originally Posted by zacs7

Perhaps you want sprintf() ?

Code:

sprintf(output, "%s%s%s", output, temp, "blah blah");

Just be aware that if you do something like this:

Code:

sprintf(output, "%s%s%s",temp, "blah blah", output);

then it most likely won't do what you want, because temp and "blah blah" will overwrite the old content of output, and it's being written directly into that pointer before the original value of output is being read, so "strange" things may happen (and it's by no means sure that output has a zero at the end in the middle of a sprintf call, so seriously strange things may happen, including crashing and "weird content" in the output text).

--
Mats