Write a program called runsim that takes one command-line argument. Check for the appropriate command-line argument and output a usage message if the...

Write a program called runsim that takes one command-line argument.Check for the appropriate command-line argument and output a usage message if the command line is incorrect.Initialize pr_limit from the command line. The pr_limit variable specifies the maximum number of children allowed to execute at a time.Initialize the pr_count variable to 0. The pr_count variable holds the number of active children.