[Konstantinos]

Stinged told you that you can't use sizeof with inputtext or an array without a size in general. Make another string and copy the text stored:

pawn Код:

#if !defined strcpy
    #define strcpy(%0,%1) strcat((%0[0] = EOS, %0), %1)
#endif

pawn Код:

static input_text[129];
strcpy(input_text, inputtext);

and then you can use strcat and join any text you want to "input_text" string. I'm not really sure if you meant to add 3 dots or it was just an example but if the text you are trying to "join" is constant, then you don't need to declare a string just for that.

pawn Код:

strcat(input_text, "...");

After done all that, use "input_text" in PlayerTextDrawSetString function.