用C语言编程WF内存分配算法实现

下面是用 C 语言实现最坏适应算法（Worst Fit Memory Allocation）的代码：

#include <stdio.h>

#define MAX_BLOCKS 100
#define MAX_PROCESS 100

int worst_fit(int blocks[], int m, int processes[], int n) {
    int memory[MAX_BLOCKS];
    for (int i = 0; i < m; i++) {
        memory[i] = -1; // 初始化内存块
    }
    for (int i = 0; i < n; i++) {
        int worst_fit_index = -1;
        for (int j = 0; j < m; j++) {
            if (blocks[j] >= processes[i]) {
                if (worst_fit_index == -1) {
                    worst_fit_index = j;
                } else if (blocks[j] > blocks[worst_fit_index]) {
                    worst_fit_index = j;
                }
            }
        }
        if (worst_fit_index != -1) {
            memory[worst_fit_index] = i; // 将进程分配到内存块中
            blocks[worst_fit_index] -= processes[i];
        }
    }
    printf("Memory Allocation using Worst Fit:\n");
    printf("Process No.\tProcess Size\tBlock No.\n");
    for (int i = 0; i < n; i++) {
        printf("%d\t\t%d\t\t", i+1, processes[i]);
        if (memory[i] != -1) {
            printf("%d", memory[i]+1);
        } else {
            printf("Not Allocated");
        }
        printf("\n");
    }
}

int main() {
    int blocks[MAX_BLOCKS], processes[MAX_PROCESS];
    int m, n;
    printf("Enter the number of memory blocks: ");
    scanf("%d", &m);
    printf("Enter the size of each memory block:\n");
    for (int i = 0; i < m; i++) {
        scanf("%d", &blocks[i]);
    }
    printf("Enter the number of processes: ");
    scanf("%d", &n);
    printf("Enter the size of each process:\n");
    for (int i = 0; i < n; i++) {
        scanf("%d", &processes[i]);
    }
    worst_fit(blocks, m, processes, n);
    return 0;
}

在该代码中，`worst_fit` 函数实现了最坏适应算法，其中 `blocks` 和 `processes` 分别是内存块和进程的大小，`m` 和 `n` 分别是内存块和进程的数量。内存块和进程的大小均为整数。函数将进程分配到可用的内存块中，并输出分配结果。程序的主函数中，先要输入内存块和进程的数量和大小，然后调用 `worst_fit` 函数实现内存分配。