不同磁盘调度算法平均寻道时间对比图c语言实现

要在C语言中实现不同磁盘调度算法的平均寻道时间对比图，可以编写一个程序来模拟这些算法并计算它们的平均寻道时间。以下是一个简单的示例程序，展示了如何实现先来先服务（FCFS）、最短寻道时间优先（SSTF）和电梯（SCAN）算法，并计算它们的平均寻道时间。 ```c #include <stdio.h> #include <stdlib.h> #define MAX_REQUESTS 100 // FCFS算法 int fcfs(int requests[], int n, int head) { int total_seek_time = 0; for(int i = 0; i < n; i++) { total_seek_time += abs(requests[i] - head); head = requests[i]; } return total_seek_time / n; } // SSTF算法 int sstf(int requests[], int n, int head) { int total_seek_time = 0; int temp[MAX_REQUESTS]; for(int i = 0; i < n; i++) { temp[i] = requests[i]; } for(int i = 0; i < n; i++) { int min = abs(temp[i] - head); int min_index = i; for(int j = i + 1; j < n; j++) { if(abs(temp[j] - head) < min) { min = abs(temp[j] - head); min_index = j; } } total_seek_time += min; head = temp[min_index]; temp[min_index] = temp[i]; } return total_seek_time / n; } // SCAN算法 int scan(int requests[], int n, int head, int disk_size) { int total_seek_time = 0; int temp[MAX_REQUESTS]; for(int i = 0; i < n; i++) { temp[i] = requests[i]; } for(int i = 0; i < n; i++) { for(int j = i + 1; j < n; j++) { if(temp[i] > temp[j]) { int t = temp[i]; temp[i] = temp[j]; temp[j] = t; } } } int index = 0; while(index < n && temp[index] < head) { index++; } for(int i = index - 1; i >= 0; i--) { total_seek_time += abs(temp[i] - head); head = temp[i]; } total_seek_time += abs(head - 0); head = 0; for(int i = index; i < n; i++) { total_seek_time += abs(temp[i] - head); head = temp[i]; } return total_seek_time / n; } int main() { int requests[MAX_REQUESTS]; int n, head, disk_size; printf("Enter the number of disk requests: "); scanf("%d", &n); printf("Enter the disk requests: "); for(int i = 0; i < n; i++) { scanf("%d", &requests[i]); } printf("Enter the initial head position: "); scanf("%d", &head); printf("Enter the disk size: "); scanf("%d", &disk_size); printf("Average seek time for FCFS: %d\n", fcfs(requests, n, head)); printf("Average seek time for SSTF: %d\n", sstf(requests, n, head)); printf("Average seek time for SCAN: %d\n", scan(requests, n, head, disk_size)); return 0; } ``` 这个程序实现了三种磁盘调度算法：FCFS、SSTF和SCAN，并计算它们的平均寻道时间。你可以根据需要扩展这个程序，添加更多的算法或图形化显示结果。