用入门c语言编写项目，数据需求： 员工绩效有编号（int）、姓名（字符数组）、部门（字符数组）、绩效分数（float）等属性； 使用结构体表示员工绩效；结构变成了顺序表，数据放在全局的结构体数组里，多了一个排序功能。 使用全局结构体数组存放绩效数据（最多1000个员工）； 再定义一个全局结构体数组用来排序； 定义一个表示实际记录数量的全局变量（初值为0）。 功能要求： 创建员工绩效记录 保存记录到文件 从文件读取员工绩效记录 保存文件后不要是乱码

好的，我可以为你提供一个简单的C语言代码示例，用于实现员工绩效记录的创建、保存和读取等功能。代码如下：

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

#define MAX_RECORDS 1000

struct Employee {
    int id;
    char name[50];
    char department[50];
    float score;
};

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

void create_record() {
    if (num_records >= MAX_RECORDS) {
        printf("The number of records has reached the maximum limit!\n");
        return;
    }

    struct Employee new_record;
    printf("Please enter the employee ID: ");
    scanf("%d", &new_record.id);
    printf("Please enter the employee name: ");
    scanf("%s", new_record.name);
    printf("Please enter the employee department: ");
    scanf("%s", new_record.department);
    printf("Please enter the employee score: ");
    scanf("%f", &new_record.score);
    
    records[num_records] = new_record;
    num_records++;
}

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;
    }
    fseek(fp, 0, SEEK_END);
    int file_size = ftell(fp);
    int num_records_in_file = file_size / sizeof(struct Employee);
    fseek(fp, 0, SEEK_SET);
    fread(records, sizeof(struct Employee), num_records_in_file, fp);
    fclose(fp);
    num_records = num_records_in_file;
    printf("Records have been loaded from file successfully!\n");
}

void sort_records() {
    memcpy(sorted_records, records, sizeof(records));
    int i, j;
    struct Employee temp;
    for (i = 0; i < num_records; i++) {
        for (j = i + 1; j < num_records; j++) {
            if (sorted_records[i].score < sorted_records[j].score) {
                temp = sorted_records[i];
                sorted_records[i] = sorted_records[j];
                sorted_records[j] = temp;
            }
        }
    }
    printf("Records have been sorted successfully!\n");
}

void print_records(struct Employee *records, int num_records) {
    int i;
    for (i = 0; i < num_records; i++) {
        printf("ID: %d, Name: %s, Department: %s, Score: %.2f\n",
                records[i].id, records[i].name, records[i].department, records[i].score);
    }
}

int main() {
    int choice;
    do {
        printf("\nEmployee Performance Record System\n");
        printf("1. Create a new record\n");
        printf("2. Save records to file\n");
        printf("3. Load records from file\n");
        printf("4. Sort records by score\n");
        printf("5. Print records\n");
        printf("0. Exit\n");
        printf("Please enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                create_record();
                break;
            case 2:
                save_records();
                break;
            case 3:
                load_records();
                break;
            case 4:
                sort_records();
                break;
            case 5:
                printf("\nAll Records:\n");
                print_records(records, num_records);
                printf("\nSorted Records:\n");
                print_records(sorted_records, num_records);
                break;
            case 0:
                printf("Exiting...\n");
                break;
            default:
                printf("Invalid choice!\n");
                break;
        }
    } while (choice != 0);

    return 0;
}

这个示例代码实现了员工绩效记录的创建、保存和读取等功能。你可以根据自己的需要进行修改和扩展。注意在保存文件时，使用二进制方式进行读写，可以避免保存文件后出现乱码的问题。