C programming

In this assignment, you will implement a $$tweet$$ maker. As you probably know, tweets are limited

to $280$ characters. This program will take an existing text file and reduce its size in an attempt to

fit it within a standard tweet$$s size. Specifically, the program will input two file names, an input

file and an output file, and two characters, all from the user. The program will open both files and

iterate through the input file character$-$by$-$character $($using getc$),$ copying each character to the

output file $($using putc$)$ unless the character is one of the following:

$1.$ a digit or a punctuation mark other than period, exclamation mark and question mark

$2.$ a letter and matches the preceding letter $($case insensitive$),$ for instance if you have oo it

will not output the second o and if you have Cc it will not output the second c

$3.$ matches either of the two input characters from the user $($case sensitive$),$ for instance if the

user enters $$a$$ and $$b$$ then any $$a$$ and $$b$$ are not output, but $$A$$ or $$B$$ would be output

To input a character, use $\%$c$$ for the specification string in scanf instead of $\%$c$.$ If you

want to input both chars in one scanf, use $\%$c $\%$c$.$

In addition to outputting $($or not$)$ the input file$$s characters to the output file, count the number of

characters from the input file $($as you input them$)$ and the number of characters sent to the output

file. After exiting the loop controlling the character$-$by$-$character input$/$output$,$ close both files,

compute the fraction of size that the output file is of the input file $($see below$)$ and then output a

report using printf statements detailing the following:

$$ name and size $($number of characters$)$ of input file

$$ name and size of output file

$$ percent difference $($output file$$s size $/$ input file$$s size $*100)$ as

a floating$-$point value with $2$ decimal points of accuracy

$$ if the output file has more than $280$ characters, a message that the file $($by name$)$ cannot be

tweeted

The output should be formatted so that the file names, sizes and the percent difference line up$.$

On the page with this assignment are three text files. Run your program on the first file,

p$1$in$1.$txt using the characters A and e as the user input $($the characters to not output$).$ You

should receive output like the following $($below you see the report generated and on the next page

the output text file$).$

Console input $($first $3$ lines$)$ & output:

Enter the input file name: p$1$in$1.$txt

Enter the output file name: p$1$out$1.$txt

Enter two characters to skip: A e

Summary of operation:

Size of input file p$1$in$1.$txt $456$

Size of output file p$1$out$1.$txt $370$

Reduction in size of output $81\mathrm{.}14\%$

Error, p$1$out$1.$txt exceeds the standard tweet size!

Notice the file names in the output and the numbers line up