Function            center - coordinate to center a message on screen

  Syntax              int center(char *str);

  Prototype in        video.h

  Remarks             center() will determine the proper X-coordinate to
                      display str centered horizontally with the current
                      window area. See Borland's explanation of window()
                      and related topics for further details.

  Return value        returns X coordinate to display str centered
                      horizontally within the window() corrdinates.

  Example             #include <video.h>

                      main()
                      {
                           char msg[] = "This will be centered on line 3"

                           gotoxy(center(msg),3);
                           cputs(msg);
                      }

  Program output

                                          This will be centered on line 3