Your job is to create a program that takes in a standard text $(.$txt$)$ file and converts that to a CSV

$(.$csv$)$ file. Each item will be designated by an individual item per line in the text file. We$$ll define

when you should have a new line in the CSV file by an exit character: $-1.$ So$,$ assume each item

is moving horizontally in the CSV$,$ until the exit character $$ which will move the file down.

So$,$ the following sample text file:

$1$

$2$

$-1$

$3$

$4$

$-1$

Would be translated to a CSV file as:

$1,2$

$3,4$

Your program should, take in a base filename $($WITHOUT AN EXTENSION$),$ open that filename

with $.$txt added and verify the existence in a loop. Once you have a valid file, read the contents

into a vector and close the input file. Then, open an output file of the input filename with $.$csv

added and write the contents of the vector appropriately.

Your program should end with the following files existing:

filename.txt

filename.csv

A couple sample text files have been provided to use