Write a C++ program that is given a file name as a command line argument. Open the file and read it. At the end of the file, print out: LINES: lc WORDS: wc CHARS: cc DIGITS: dc Where lc is the number of lines, wc is the number of words, cc is the number of characters, and dc is the number of digit characters, 0-9. If no file name is provided, the program should use the standard input instead of a file. If the file cannot be opened, print "CANNOT OPEN " followed by a space and the filename, and stop. The program should ignore any extra command line arguments that are provided after the file name.

use istream

Only write the code in main, make no functions.