The wordcount program gets the file names as command line arguments. It then creates n = argc - 1 child processes using fork() in a loop and expects each child process to count the number of words in each file. Basically, you need to first implement the the following code segment in wordcount. c. for(i=1; i < argc; i++) { if (fork() == 0) { // child process // call a function to count the number of words in file argv[i] // print the number of words in file argv[i] or error message if file argv[i] does not exist // return/exit with an exit code of 1 if the file argv[i] does not exist.

Write a new lc-3 trap subroutine (i.e. a subroutine that will be invoked via the trap instruction) that will receive a numeric digit entered at the keyboard (i.e. an ascii character), echo it to the screen, and return in r0 the corresponding numeric value: so if the user types the digit '7', the character '7' will appear on the screen, but the value returned in r0 will be b0000 0000 0000 0111 (#7) you may not use any trap calls in your code - you must implement the "polling" code that interrogates the keyboard status and data registers. ; getnum_tsr ; a subroutine for obtaining a numeric value ; given ascii numeric digit input to keyboard. ; the numeric digit is echoed to the console (e.g. '7' = b0000 0000 0011 0111), ; but the value returned in r0 is the actual numeric value ; corresponding to the digit (e.g. b0000 0000 0000 0111 =