使用全局顺序表结构解决void save_records() { FILE *fp; fp = fopen("records.dat", "wb"); if (fp == NULL) { printf("Failed to open file!\n"); return; } fwrite(records, sizeof(struct Employee), num_records, fp); fclose(fp); printf("Records have been saved to file successfully!\n"); } 这段代码保存后打开查看是乱码的问题

如果要使用全局顺序表结构来解决这个问题，可以将结构体数组 `records` 定义为全局变量，并在保存和读取数据时使用该全局变量。具体代码如下：

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

#define MAX_RECORDS 100

struct Employee {
    int id;
    char name[20];
    int age;
};

struct Employee records[MAX_RECORDS];
int num_records = 0;

void save_records() {
    FILE *fp;
    fp = fopen("records.dat", "wb");
    if (fp == NULL) {
        printf("Failed to open file!\n");
        return;
    }
    fwrite(records, sizeof(struct Employee), num_records, fp);
    fclose(fp);
    printf("Records have been saved to file successfully!\n");
}

void load_records() {
    FILE *fp;
    fp = fopen("records.dat", "rb");
    if (fp == NULL) {
        printf("Failed to open file!\n");
        return;
    }
    num_records = fread(records, sizeof(struct Employee), MAX_RECORDS, fp);
    fclose(fp);
    printf("Records have been loaded from file successfully!\n");
}

int main() {
    // 其他代码
    return 0;
}

在这个代码中，我们将结构体数组 `records` 和记录数 `num_records` 定义为全局变量，可以在 `save_records` 和 `load_records` 函数中直接使用这些全局变量来保存和读取数据。