Using C language to implement LRU page replacement algorithm
In a computer operating system, when memory is low, some pages need to be moved out of memory to make room for new pages. LRU (Least Recently Used) is a common page replacement algorithm that moves the least recently used pages out of memory.
Below we use C language to implement the LRU page replacement algorithm. Specific steps are as follows:
1. Create a linked list to store the loaded page information;
2. Traverse the linked list to find out whether there is a page to be loaded;
3. If the page does not exist in the linked list, load the page into the memory and add it to the head of the linked list;
4. If the page exists in the linked list, move the page to the head of the linked list;
5. If the number of pages in the memory exceeds the preset value, move the pages at the end of the linked list out of the memory.
The following is the code implemented based on the above ideas:
#include <stdio.h>
#include <stdlib.h>
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