用c语言实现动态优先权调度,基于动态优先权的进程调度算法的模拟实现

好的，我可以为您提供一份基于C语言实现动态优先权调度的代码示例。以下是示例代码：

#include <stdio.h>
#include <stdlib.h>

#define MAX_PROCESS 10

typedef struct {
    int process_id;
    int arrival_time;
    int burst_time;
    int priority;
    int waiting_time;
    int turnaround_time;
    int remaining_time;
} Process;

void dynamic_priority(Process *processes, int n) {
    int current_time = 0;
    int completed = 0;
    float total_waiting_time = 0;
    float total_turnaround_time = 0;

    // Calculate initial waiting time and remaining time for each process
    for (int i = 0; i < n; i++) {
        processes[i].waiting_time = 0;
        processes[i].remaining_time = processes[i].burst_time;
    }

    printf("Process Execution Order: ");

    while (completed != n) {
        // Find process with highest priority and remaining time
        int highest_priority = -1;
        int highest_priority_process = -1;
        for (int i = 0; i < n; i++) {
            if (processes[i].arrival_time <= current_time &&
                processes[i].remaining_time > 0 &&
                (highest_priority == -1 || processes[i].priority < highest_priority)) {
                highest_priority = processes[i].priority;
                highest_priority_process = i;
            }
        }

        // If no process is available at current time, increase time
        if (highest_priority_process == -1) {
            current_time++;
            continue;
        }

        // Execute the process with highest priority and remaining time
        Process *current_process = &processes[highest_priority_process];
        current_process->remaining_time--;
        current_time++;

        // Print execution order
        printf("P%d ", current_process->process_id);

        // If process is completed, calculate waiting and turnaround time
        if (current_process->remaining_time == 0) {
            completed++;
            current_process->waiting_time = current_time - current_process->arrival_time -
                                             current_process->burst_time;
            current_process->turnaround_time = current_process->waiting_time +
                                               current_process->burst_time;
            total_waiting_time += current_process->waiting_time;
            total_turnaround_time += current_process->turnaround_time;
        }
    }

    // Calculate average waiting and turnaround time
    float avg_waiting_time = total_waiting_time / n;
    float avg_turnaround_time = total_turnaround_time / n;

    printf("\n\nAverage Waiting Time: %.2f\n", avg_waiting_time);
    printf("Average Turnaround Time: %.2f\n", avg_turnaround_time);
}

int main() {
    int n;
    Process processes[MAX_PROCESS];

    printf("Enter number of processes: ");
    scanf("%d", &n);

    // Input process details
    for (int i = 0; i < n; i++) {
        printf("\nProcess %d:\n", i + 1);
        processes[i].process_id = i + 1;
        printf("Arrival Time: ");
        scanf("%d", &processes[i].arrival_time);
        printf("Burst Time: ");
        scanf("%d", &processes[i].burst_time);
        printf("Priority: ");
        scanf("%d", &processes[i].priority);
    }

    // Run dynamic priority scheduling algorithm
    dynamic_priority(processes, n);

    return 0;
}

这份代码实现了动态优先权调度算法，并计算了每个进程的等待时间和周转时间，以及平均等待时间和平均周转时间。您可以通过输入进程数以及每个进程的到达时间、执行时间和优先级来测试此代码。