编写并调试一个模拟的进程调度程序,采用“最高优先数优先”调度算法对五个进程进行调度。
时间: 2024-05-30 18:14:25 浏览: 5
好的,我可以回答你的问题。最高优先数优先调度算法是一种非抢占式的调度算法,它会根据每个进程的优先级来确定下一个要运行的进程。在这个模拟程序中,你需要为五个进程分配不同的优先级,并且在每个时间片结束时更新它们的优先级。然后,根据当前的优先级选择下一个要运行的进程。这个算法可以确保优先级高的进程先运行,从而提高整个系统的性能。
相关问题
用c++编写采用“最高优先数优先”调度算法对五个进程进行调度
由于没有具体的进程任务和优先级,以下代码仅为示例:
```c
#include <stdio.h>
#define NUM_PROCESSES 5
struct process {
int pid; // 进程ID
int priority; // 优先级
};
typedef struct process Process;
int main() {
Process processes[NUM_PROCESSES] = {
{1, 2},
{2, 3},
{3, 1},
{4, 4},
{5, 2}
};
int i, j;
Process temp;
// 对进程按照优先级从高到低排序
for (i = 0; i < NUM_PROCESSES - 1; i++) {
for (j = i + 1; j < NUM_PROCESSES; j++) {
if (processes[i].priority < processes[j].priority) {
temp = processes[i];
processes[i] = processes[j];
processes[j] = temp;
}
}
}
// 模拟进程执行
for (i = 0; i < NUM_PROCESSES; i++) {
printf("正在执行进程 %d(优先级:%d)\n", processes[i].pid, processes[i].priority);
}
return 0;
}
```
输出结果如下:
```
正在执行进程 4(优先级:4)
正在执行进程 2(优先级:3)
正在执行进程 1(优先级:2)
正在执行进程 5(优先级:2)
正在执行进程 3(优先级:1)
```
用c++编写采用“最高优先数优先”调度算法对五个进程进行调度的代码
以下是使用C语言编写的基于“最高优先数优先”调度算法的代码,其中有五个进程:
```c
#include <stdio.h>
#define MAX_PROCESS 5
int main() {
int burst_time[MAX_PROCESS], priority[MAX_PROCESS], turnaround_time[MAX_PROCESS], waiting_time[MAX_PROCESS], completion_time[MAX_PROCESS];
int i, j, highest_priority_index, total_waiting_time = 0, total_turnaround_time = 0;
// 输入每个进程的执行时间和优先级
printf("Enter burst time and priority for each process:\n");
for (i = 0; i < MAX_PROCESS; i++) {
printf("Process %d: ", i + 1);
scanf("%d %d", &burst_time[i], &priority[i]);
}
// 按照优先级对进程进行排序
for (i = 0; i < MAX_PROCESS - 1; i++) {
highest_priority_index = i;
for (j = i + 1; j < MAX_PROCESS; j++) {
if (priority[j] > priority[highest_priority_index]) {
highest_priority_index = j;
}
}
// 将优先级最高的进程移到最前面
if (highest_priority_index != i) {
int temp_burst_time = burst_time[i], temp_priority = priority[i];
burst_time[i] = burst_time[highest_priority_index];
priority[i] = priority[highest_priority_index];
burst_time[highest_priority_index] = temp_burst_time;
priority[highest_priority_index] = temp_priority;
}
}
// 计算每个进程的完成时间、周转时间和等待时间
completion_time[0] = burst_time[0];
turnaround_time[0] = completion_time[0];
waiting_time[0] = 0;
for (i = 1; i < MAX_PROCESS; i++) {
completion_time[i] = completion_time[i - 1] + burst_time[i];
turnaround_time[i] = completion_time[i];
waiting_time[i] = completion_time[i - 1];
total_waiting_time += waiting_time[i];
total_turnaround_time += turnaround_time[i];
}
// 输出每个进程的完成时间、周转时间和等待时间
printf("\nProcess\tBurst Time\tPriority\tCompletion Time\tTurnaround Time\tWaiting Time\n");
for (i = 0; i < MAX_PROCESS; i++) {
printf("%d\t\t%d\t\t%d\t\t%d\t\t\t%d\t\t\t%d\n", i + 1, burst_time[i], priority[i], completion_time[i], turnaround_time[i], waiting_time[i]);
}
// 输出平均周转时间和平均等待时间
printf("\nAverage Turnaround Time: %.2f\n", (float) total_turnaround_time / MAX_PROCESS);
printf("Average Waiting Time: %.2f\n", (float) total_waiting_time / MAX_PROCESS);
return 0;
}
```
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