This program illustrates a vector of strings. It shows how to read the lines
of a textfile into a vector of strings and then display the contents of the
resulting vector on the screen. It thus provides a simple "display textfile"
routine. The user is asked to enter the name of the textfile and choose how
many lines to show at a time.
Press Enter to continue ...

Enter name of file to display (include full path if necessary):
15lines.txt
How many lines do you want to see at once? 6
This is a file of  text containing
fifteen lines, including the blank
line at the end.
Line 4
Line 5
Line 6
Press Enter to continue ...
Line 7
Line 8
Line 9
Line 10
Line 11
Line 12
Press Enter to continue ...
Line 13
Line 14

===== The entire file has now been displayed. =====
Press Enter to continue ...