Write a program to generate personalized junk mail. The program takes

input both from an input file and from the keyboard. The input file contains the text of a letter, except that the name of the recipient is indicated by the three characters #N#. The program asks the user for a name and then writes the letter to a second file but with the three letters #N# replaced by the name. The three-letter string #N# will occur exactly once in the letter.

Hint: Have your program read from the input file until it encounters the

three characters #N#, and have it copy what it reads to the output file as it goes. When it encounters the three letters #N#, it then sends output to the screen asking for the name from the keyboard. You should be able to

figure out the rest of the details. Your program should define a function

that is called with the input- and output-file streams as arguments. If this

is being done as a class assignment, obtain the file names from your

instructor.

Harder version (using material in the optional section “File Names as

Input”): Allow the string #N# to occur any number of times in the file.

In this case the name is stored in two string variables. For this version

assume that there is a first name and last name but no middle names

or initials.