I could not understand where the problem is. getline does take 3 parameters.
istream& getline (char* s, streamsize n, char delim );
s » A pointer to an array of characters.
n » The maximum number of characters to store, including the ternimating null character.
delim » The delimiter. The operation of extracting succesive characters is stopped when delimiter is read. This parameter is optional, if not specified the function considers '\n' the delimiter.