Introduction - If you have any usage issues, please Google them yourself
The end of the line of the output file, C language operations command tail to print the file in the last n lines. The command format is: tail [-n] filename, including:-n: n the number of rows that need to print, when n is omitted, a value of 10. filename: the filename. For example, the command tail-20 example.txt said print file example.txt the last 20 lines, using C language to implement the program. (Hint: Use the command-line parameters)