采用先来先服务FCFS调度进程运行,计算每个进程的周转时间,带权周转时间,并且计算所有进程的平均周转时间,带权平均周转时间; 要求模拟整个调度过程,输出每个时刻的进程运行状态,如“时刻3:进程B开始运行”; 要求输出计算出来的每个进程的周转时间,带权周转时间,所有进程的平均周转时间,带权平均周转时间,C语言代码
时间: 2024-03-07 11:48:40 浏览: 51
好的,我来解答你的问题。以下是一个简单的模拟先来先服务FCFS调度的进程运行的C语言代码,包括计算每个进程的周转时间和带权周转时间,以及输出每个时刻的进程运行状态:
```
#include <stdio.h>
#define MAX_PROCESSES 10
struct Process {
int arrival_time;
int burst_time;
int completion_time;
int turnaround_time;
float normalized_turnaround_time;
};
int main() {
int i, j, n;
float average_turnaround_time = 0, average_normalized_turnaround_time = 0;
struct Process processes[MAX_PROCESSES], temp;
printf("Enter the number of processes: ");
scanf("%d", &n);
// Input process arrival time and burst time
for (i = 0; i < n; i++) {
printf("Enter the arrival time and burst time of process %d: ", i + 1);
scanf("%d %d", &processes[i].arrival_time, &processes[i].burst_time);
}
// Sort processes by arrival time using bubble sort
for (i = 0; i < n - 1; i++) {
for (j = 0; j < n - i - 1; j++) {
if (processes[j].arrival_time > processes[j + 1].arrival_time) {
temp = processes[j];
processes[j] = processes[j + 1];
processes[j + 1] = temp;
}
}
}
// Calculate completion time, turnaround time, and normalized turnaround time
for (i = 0; i < n; i++) {
if (i == 0) {
processes[i].completion_time = processes[i].burst_time;
} else {
processes[i].completion_time = processes[i - 1].completion_time + processes[i].burst_time;
}
processes[i].turnaround_time = processes[i].completion_time - processes[i].arrival_time;
processes[i].normalized_turnaround_time = (float) processes[i].turnaround_time / processes[i].burst_time;
}
// Calculate average turnaround time and normalized turnaround time
for (i = 0; i < n; i++) {
average_turnaround_time += processes[i].turnaround_time;
average_normalized_turnaround_time += processes[i].normalized_turnaround_time;
}
average_turnaround_time /= n;
average_normalized_turnaround_time /= n;
// Output process running status and results
printf("Time\tProcess\tStatus\n");
for (i = 0; i < n; i++) {
printf("%d\t%d\tStarted\n", processes[i].arrival_time, i + 1);
printf("%d\t%d\tCompleted\n", processes[i].completion_time, i + 1);
}
printf("Average turnaround time: %.2f\n", average_turnaround_time);
printf("Average normalized turnaround time: %.2f\n", average_normalized_turnaround_time);
return 0;
}
```
这个代码中,我们首先输入进程的到达时间和运行时间,然后根据到达时间对进程进行排序,采用冒泡排序算法。接下来,我们计算每个进程的完成时间、周转时间和带权周转时间,并计算所有进程的平均周转时间和带权平均周转时间。最后,我们输出每个时刻的进程运行状态,以及计算出来的结果。
注意,这个代码只是一个简单的模拟,实际的操作系统调度算法会更加复杂,需要考虑多种因素。
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