Repeat Exercise E7.4, but allow the user to specify the file name on the commandline. If the user doesn’t specify any file name, then prompt the user for the name.

Data from Exercise E7.4,

Write a program that reads a file containing text. Read each line and send it to the output file, preceded by line numbers. If the input file is Mary had a little lamb Whose fleece was white as snow. And everywhere that Mary went, The lamb was sure to go! then the program produces the output file

/* 1 */ Mary had a little lamb
/* 2 */ Whose fleece was white as snow.
/* 3 */ And everywhere that Mary went,
/* 4 */ The lamb was sure to go!

The line numbers are enclosed in /* */ delimiters so that the program can be used for numbering Java source files. Prompt the user for the input and output file names.

Transcribed Image Text:

O Chris Pricel Stockphoto.