Question

Is there a way of copying a string into a new string without knowing the size that the new array has to be at compile time? As far as I am aware, you can’t have variable array lengths in C.

For example:

void myFunction(char *string)
{
   char newString[????];

   strcopy(newString, string);
}

Answer 1

Yes there is:

void myFunction(char *string)
{
   char *newString = strdup (string);
   ... (make use of newString) ...
   free (newString);
}

This works with any version of C—even back to v6 Unix (1975).