Linux 学生选课管理系统储存数据使用文件系统储存数据的代码是什么

使用Linux文件系统储存数据时，需要使用文件读写操作来实现数据的增删改查功能。以下是使用C语言实现的一个简单的Linux学生选课管理系统，它使用文本文件来储存学生选课信息的代码示例：

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

#define MAX_STUDENT_NUM 1000
#define MAX_COURSE_NUM 100
#define MAX_LINE_LENGTH 1024

typedef struct {
    char name[64];
    int age;
    char gender[8];
    char id[32];
    char major[64];
} student_t;

typedef struct {
    char name[64];
    int credit;
} course_t;

int read_student_file(student_t *students, const char *filename) {
    int count = 0;
    char line[MAX_LINE_LENGTH];
    FILE *fp = fopen(filename, "r");
    if (fp == NULL) {
        printf("Error: cannot open file %s\n", filename);
        return 0;
    }
    while (fgets(line, MAX_LINE_LENGTH, fp) != NULL) {
        sscanf(line, "%s %d %s %s %s", students[count].name, &students[count].age, students[count].gender, students[count].id, students[count].major);
        count++;
    }
    fclose(fp);
    return count;
}

int read_course_file(course_t *courses, const char *filename) {
    int count = 0;
    char line[MAX_LINE_LENGTH];
    FILE *fp = fopen(filename, "r");
    if (fp == NULL) {
        printf("Error: cannot open file %s\n", filename);
        return 0;
    }
    while (fgets(line, MAX_LINE_LENGTH, fp) != NULL) {
        sscanf(line, "%s %d", courses[count].name, &courses[count].credit);
        count++;
    }
    fclose(fp);
    return count;
}

void write_student_file(student_t *students, int count, const char *filename) {
    int i;
    FILE *fp = fopen(filename, "w");
    if (fp == NULL) {
        printf("Error: cannot open file %s\n", filename);
        return;
    }
    for (i = 0; i < count; i++) {
        fprintf(fp, "%s %d %s %s %s\n", students[i].name, students[i].age, students[i].gender, students[i].id, students[i].major);
    }
    fclose(fp);
}

void write_course_file(course_t *courses, int count, const char *filename) {
    int i;
    FILE *fp = fopen(filename, "w");
    if (fp == NULL) {
        printf("Error: cannot open file %s\n", filename);
        return;
    }
    for (i = 0; i < count; i++) {
        fprintf(fp, "%s %d\n", courses[i].name, courses[i].credit);
    }
    fclose(fp);
}

int main(int argc, char *argv[]) {
    student_t students[MAX_STUDENT_NUM];
    course_t courses[MAX_COURSE_NUM];
    int student_count, course_count;

    student_count = read_student_file(students, "student.txt");
    course_count = read_course_file(courses, "course.txt");

    // TODO: 实现选课系统的增删改查功能

    write_student_file(students, student_count, "student.txt");
    write_course_file(courses, course_count, "course.txt");

    return 0;
}

在上面的代码中，read_student_file()和read_course_file()函数用于读取学生和课程信息的文本文件，write_student_file()和write_course_file()函数则用于将学生和课程信息写入到文本文件中。在main()函数中，可以实现选课系统的增删改查功能，并在操作完成后将学生和课程信息写回到文本文件中。