$ ./wc (-c | -l | -w) [files...]

The wc utility shall read one or more input files and, by default, write the number of newlines, words, or bytes contained in each input file to the standard output. The utility also shall write a total count for all named files, if more than one input file is specified. The wc utility shall consider a word to be a non-zero-length string of characters delimited by white space. If no file operand is specified, or when file is -, then standard input is assumed.

Your program will be passed exactly one of the following:

-c: Write to the standard output the number of bytes in each input file.

-l: Write to the standard output the number of newlines in each input file.

-w: Write to the standard output the number of words in each input file.