把参数换成别的

你是想让我帮你改变代码中的变量名吗？如果是的话，可以参考下面的代码：

#include <stdio.h>
#include <stdlib.h>

#define PAGE_SIZE 32
#define PAGE_NUM 4
#define FRAME_NUM 8
#define BACKINGSTORE_SIZE 256

int page_table[PAGE_NUM];
char physical_memory[FRAME_NUM][PAGE_SIZE];
char backing_store[BACKINGSTORE_SIZE];

void load_page_to_frame(int page_idx, int idx) {
    FILE *fp;
    fp = fopen("pdata.bin", "rb");
    if (fp == NULL) {
        printf("Failed to open file.\n");
        exit(1);
    }
    fread(physical_memory[idx], sizeof(char), PAGE_SIZE, fp);
    fseek(fp, page_idx * PAGE_SIZE, SEEK_SET);
    fclose(fp);
}

int get_physical_address(int page_idx, int page_offset) {
    int idx = page_table[page_idx]; // idx is frame index
    if (idx == -1) {
        int c = 0, r = 0;
        while (c < FRAME_NUM) {
            if (page_table[c] != -1) {
                r++;
            }
            c++;
        }
        if (r == FRAME_NUM) {
            printf("Page fault happen.\n");
            idx = rand() % FRAME_NUM;
            int page_idx_replace = -1;
            for (int c = 0; c < PAGE_NUM; c++) {
                if (page_table[c] == idx) {
                    page_idx_replace = c;
                    break;
                }
            }
            page_table[page_idx_replace] = -1;
        } else {
            idx = r;
        }
        page_table[page_idx] = idx;
        load_page_to_frame(page_idx, idx); // Loading page
    }
    return idx * PAGE_SIZE + page_offset;
}

int main() {
    for (int i = 0; i < FRAME_NUM; i++) {
        page_table[i] = -1;
    }

    FILE *fp;
    fp = fopen("pdata.bin", "rb");
    if (fp == NULL) {
        printf("Failed to open file.\n");
        exit(1);
    }
    fread(backing_store, sizeof(char), BACKINGSTORE_SIZE, fp);
    fclose(fp);

    printf("data in pdata.bin:\n");
    int j = 0;
    for (int i = 0; i < BACKINGSTORE_SIZE;) {
        if (i % 32 == 0) {
            printf("page %d\n", j++);
        }
        printf("%d\t", backing_store[i++]);
        if (i % 8 == 0) {
            printf("\n");
        }
    }

    // read the logical address from la.txt
    fp = fopen("la.txt", "r");
    if (fp == NULL) {
        printf("Failed to open file\n");
        exit(1);
    }

    int ld; // logical address
    int page_idx, page_offset;
    int pd; // physical address
    int v;  // value

    // get two address and print out
    while (fscanf(fp, "%d", &ld) != EOF) {
        page_idx = ld / PAGE_SIZE;
        page_offset = ld % PAGE_SIZE;
        pd = get_physical_address(page_idx, page_offset); // get the physical address
        v = backing_store[page_offset + page_idx * PAGE_SIZE]; // find value in backing store
        printf("\npage no: %d    offset: %d\nVirtual address: %d    Physical address: %d    Value: %d\n", page_idx, page_offset, ld, pd, v);
    }

    fclose(fp);

    return 0;
}

注意，这里修改的只是变量名，代码逻辑和功能并没有改变。