高响应比优先调度算法C语言

以下是高响应比优先调度算法的C语言实现：

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

struct process {
    int pid; // 进程ID
    int arrival_time; // 到达时间
    int burst_time; // 执行时间
    int waiting_time; // 等待时间
    int turnaround_time; // 周转时间
    int response_ratio; // 响应比
};

int main() {
    int n, i, j;
    float avg_waiting_time = 0, avg_turnaround_time = 0;
    printf("请输入进程数：");
    scanf("%d", &n);
    struct process p[n], temp;
    for (i = 0; i < n; i++) {
        printf("请输入第%d个进程的到达时间和执行时间：", i + 1);
        scanf("%d%d", &p[i].arrival_time, &p[i].burst_time);
        p[i].pid = i + 1;
        p[i].waiting_time = p[i].turnaround_time = 0;
        p[i].response_ratio = 0;
    }
    // 计算等待时间、周转时间和响应比
    for (i = 0; i < n; i++) {
        for (j = i + 1; j < n; j++) {
            if (p[i].arrival_time > p[j].arrival_time) {
                temp = p[i];
                p[i] = p[j];
                p[j] = temp;
            }
        }
    }
    int current_time = 0, completed = 0;
    while (completed != n) {
        int max_response_ratio = -1, index = -1;
        for (i = 0; i < n; i++) {
            if (p[i].arrival_time <= current_time && p[i].response_ratio > max_response_ratio) {
                max_response_ratio = p[i].response_ratio;
                index = i;
            }
        }
        if (index != -1) {
            p[index].waiting_time = current_time - p[index].arrival_time;
            p[index].turnaround_time = p[index].waiting_time + p[index].burst_time;
            p[index].response_ratio = (float) p[index].turnaround_time / p[index].burst_time;
            avg_waiting_time += p[index].waiting_time;
            avg_turnaround_time += p[index].turnaround_time;
            current_time += p[index].burst_time;
            completed++;
        } else {
            current_time++;
        }
    }
    avg_waiting_time /= n;
    avg_turnaround_time /= n;
    printf("进程ID\t到达时间\t执行时间\t等待时间\t周转时间\t响应比\n");
    for (i = 0; i < n; i++) {
        printf("%d\t\t%d\t\t%d\t\t%d\t\t%d\t\t%.2f\n", p[i].pid, p[i].arrival_time, p[i].burst_time, p[i].waiting_time, p[i].turnaround_time, p[i].response_ratio);
    }
    printf("平均等待时间：%.2f\n", avg_waiting_time);
    printf("平均周转时间：%.2f\n", avg_turnaround_time);
    return 0;
}