c++ using linked list

I want the methods to run separately, not all at the same time.

Your project is to write a program that simulates the service of jobs (process) by the CPU of a multi-user computer. Inputs should be taken from text file with command arguments. And results also should be written to output file and screen.

Scheduling Method: In this mode program optain scheduling method from user. You should implement: None: None of scheduling method chosen First Come, First Served Scheduling Shortest-Job-First Scheduling Priority Scheduling Round-Robin Scheduling (You should also obtain time quantum value)

Preemptive Mode: This is a clock-driven mode, in which the clock is a counter that is incremented each simulated second. The clock is initially 0, and continues "ticking" until all the jobs in the input have been serviced and left the system. This simulation runs until a particular number of jobs have been serviced.

Non-preemptive Mode: In this mode dispatcher should make decision after running process was terminated.

Scheduling Method: First Come First Served Process Waiting Times: P1: 0 ms P2: 4 ms P3: 8 ms P4: 10 ms P5: 13 ms Average Waiting Time: 7 ms Scheduling Method: Shortest Job First - Non-Preemptive Process Waiting Times: P1: 0 ms P2: 10 ms P3: 4 ms P4: 13 ms P5: 5 ms Average Waiting Time: 6.4 ms Scheduling Method: Shortest Job First -Preemptive Process Waiting Times: P1: 6 ms P2: 10 ms P3: 0 ms P4: 13 ms PS: 1 ms Average Waiting Time: 6 ms Scheduling Method: Priority Scheduling - Preemptive Process Waiting Times: P1: 14 ms P2: 6 ms P3: 0 ms P4: 9 ms P5: 1 ms Average Waiting Time: 6 ms