C语言 插入一个学生的数据并按成绩排序后存入新文件。

stud文件中的学生数据,按平均分进行排序处理,将已排序的学生数据存 入一个新文件stu_sort中。

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

typedef struct {
    int id;
    char name[50];
    float scores[3];
    float average;
} Student;

int compare(const void *a, const void *b) {
    return ((Student *)b)->average - ((Student *)a)->average;
}

int main() {
    Student students[5];
    FILE *file = fopen("stud.txt", "r");
    if (file == NULL) {
        printf("无法打开文件!\n");
        return 1;
    }

    for (int i = 0; i < 5; i++) {
        fscanf(file, "%d %s %f %f %f %f", &students[i].id, students[i].name, &students[i].scores[0], &students[i].scores[1], &students[i].scores[2], &students[i].average);
    }
    fclose(file);

    qsort(students, 5, sizeof(Student), compare);

    file = fopen("stu_sort.txt", "w");
    if (file == NULL) {
        printf("无法创建文件!\n