磁盘cscan算法流程图图片
时间: 2023-11-25 13:34:29 浏览: 43
以下是磁盘C-SCAN算法的流程图:
![磁盘C-SCAN算法流程图](https://img-blog.csdn.net/20180718212725251?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d3ZXh2aWV3/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/q/80)
相关问题
请帮我用c语言依次实现操作系统中磁盘调度算法FCFS算法和SSTF算法和SCAN算法和CSCAN算法。
以下是C语言实现FCFS、SSTF、SCAN、CSCAN四种磁盘调度算法的代码:
1. FCFS算法
```c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
int n, i, j, head, sum = 0;
printf("请输入磁盘请求数量:");
scanf("%d", &n);
int a[n];
printf("请输入磁盘请求序列:");
for(i = 0; i < n; i++)
{
scanf("%d", &a[i]);
}
printf("请输入磁头初始位置:");
scanf("%d", &head);
for(i = 0; i < n; i++)
{
sum += abs(head - a[i]);
head = a[i];
}
printf("磁头移动距离为:%d\n", sum);
return 0;
}
```
2. SSTF算法
```c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
int n, i, j, head, sum = 0, min, index;
printf("请输入磁盘请求数量:");
scanf("%d", &n);
int a[n], b[n];
printf("请输入磁盘请求序列:");
for(i = 0; i < n; i++)
{
scanf("%d", &a[i]);
b[i] = 0;
}
printf("请输入磁头初始位置:");
scanf("%d", &head);
for(i = 0; i < n; i++)
{
min = 1000000;
for(j = 0; j < n; j++)
{
if(b[j] == 0 && abs(head - a[j]) < min)
{
min = abs(head - a[j]);
index = j;
}
}
b[index] = 1;
sum += min;
head = a[index];
}
printf("磁头移动距离为:%d\n", sum);
return 0;
}
```
3. SCAN算法
```c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
int n, i, j, head, sum = 0, min, index, flag = 0;
printf("请输入磁盘请求数量:");
scanf("%d", &n);
int a[n], b[n];
printf("请输入磁盘请求序列:");
for(i = 0; i < n; i++)
{
scanf("%d", &a[i]);
b[i] = 0;
}
printf("请输入磁头初始位置:");
scanf("%d", &head);
for(i = 0; i < n; i++)
{
min = 1000000;
for(j = 0; j < n; j++)
{
if(b[j] == 0 && abs(head - a[j]) < min)
{
if(flag == 0 && a[j] >= head)
{
min = abs(head - a[j]);
index = j;
}
else if(flag == 1 && a[j] <= head)
{
min = abs(head - a[j]);
index = j;
}
else if(flag == 0 && a[j] < head)
{
min = abs(head - a[j]);
index = j;
}
else if(flag == 1 && a[j] > head)
{
min = abs(head - a[j]);
index = j;
}
}
}
b[index] = 1;
sum += min;
head = a[index];
if(flag == 0 && head == 0)
{
flag = 1;
}
else if(flag == 1 && head == 199)
{
flag = 0;
}
}
printf("磁头移动距离为:%d\n", sum);
return 0;
}
```
4. CSCAN算法
```c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
int n, i, j, head, sum = 0, min, index, flag = 0;
printf("请输入磁盘请求数量:");
scanf("%d", &n);
int a[n], b[n];
printf("请输入磁盘请求序列:");
for(i = 0; i < n; i++)
{
scanf("%d", &a[i]);
b[i] = 0;
}
printf("请输入磁头初始位置:");
scanf("%d", &head);
for(i = 0; i < n; i++)
{
min = 1000000;
for(j = 0; j < n; j++)
{
if(b[j] == 0 && abs(head - a[j]) < min)
{
if(flag == 0 && a[j] >= head)
{
min = abs(head - a[j]);
index = j;
}
else if(flag == 1 && a[j] <= head)
{
min = abs(head - a[j]);
index = j;
}
}
}
b[index] = 1;
sum += min;
head = a[index];
if(flag == 0 && head == 199)
{
flag = 1;
sum += 199;
head = 0;
}
else if(flag == 1 && head == 0)
{
flag = 0;
sum += 199;
head = 199;
}
}
printf("磁头移动距离为:%d\n", sum);
return 0;
}
```
fcfs、sstf、scan、cscan算法 python
等。这些器件的制造离不开优异的光学材料。
3. 医疗行业:医疗下面是四种磁盘调度算法的 Python 实现:
1. FCFS 算法:
```python
def FCFS(arr, head):
seek_count = 0
distance = 0
for i in range(len(arr)):
distance = abs行业是功能材料的新兴应用领域。医疗行业涉及到各种医疗器械和药(head - arr[i])
seek_count += distance
head = arr[i]
return seek_count
```
2. SSTF 算物的生产和应用,这些器械和药物的制造离不开优异的生物材料。
法:
```python
def SSTF(arr, head):
seek_count = 0
distance = 0
cur_track =4. 航空航天行业:航空航天行业是功能材料的高端应用领域。航空 head
while len(arr) > 0:
closest_track = min(arr, key=lambda x: abs(x - cur_track))
航天行业涉及到各种高科技产品的生产和应用,这些产品的制造离不开 distance = abs(closest_track - cur_track)
seek_count += distance
cur_track = closest_track
arr.remove(cur_track)
优异的功能材料。
四、功能材料的未来发展
随着科技的不断进步,功能 return seek_count
```
3. SCAN 算法:
```python
def SCAN(arr, head, direction):
seek_count = 材料的应用领域将越来越广泛。未来,功能材料的发展将具有以下几个0
distance = 0
left = []
right = []
for i in range(len(arr)):
if arr[i]趋势:
1. 多功能材料:未来的功能材料将具有多种功能,可以同时实现多种 < head:
left.append(arr[i])
else:
right.append(arr[i])
left = sorted(left, reverse=True)
right = sorted(right)
if direction == "left":
for i in range(len(left)):
distance = abs(head - left[i])
应用。例如,一种材料可以既具有优异的电学性能,又具有良好的光学 seek_count += distance
head = left[i]
seek_count += abs(head - 0)
head = 0
for性能。
2. 纳米材料:纳米技术的发展将推动纳米材料的应用。纳 i in range(len(right)):
distance = abs(head - right[i])
seek_count += distance
head = right[i]
elif米材料具有优异的物理、化学性能,可以用于制造高性能的产品。
3. direction == "right":
for i in range(len(right)):
distance = abs(head - right[i])
seek_count += distance
绿色材料:未来的功能材料将越来越注重环保和可持续发展。绿色材 head = right[i]
seek_count += abs(head - 199)
head = 199
for i in range(len(left)):
料具有低污染、低能耗、可回收等特点,可以用于制造更加环保的产品 distance = abs(head - left[i])
seek_count += distance
head = left[i]
return seek_count
```
4。
4. 智能材料:未来的功能材料将具有智能化的特点,可以实现自适. CSCAN 算法:
```python
def CSCAN(arr, head, direction):
seek_count = 0
distance = 应、自修复、自感应等功能。这些材料可以用于制造更加智能化的产品。
0
left = []
right = []
for i in range(len(arr)):
if arr[i] < head:
left.append总之,功能材料的发展将不断推动高科技产品的发展,为人类的生产和(arr[i])
else:
right.append(arr[i])
left = sorted(left, reverse=True)
right = sorted(right)
if生活带来更多的便利和福利。