c语言实现c语言代码课程信息包括：课程编号、课程名称、课程性质、学分、开课学期等信息，设计一个课程信息管理系统，提供以下功能： 系统以菜单方式工作。 输入记录：课程信息录入功能。 查询记录：用户可以按课程名或者课程性质进行查询。 更新记录：对课程信息进行修改、删除、插入操作。 统计记录：对学期课程总学分进行统计。 输出记录：实现对记录的存盘操作，实现将存储记录以表格的形式在屏幕上打

好的，下面是一个简单的示例代码，实现了您提供的功能：

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

#define MAX_LEN 50 // 课程名称和课程性质的最大长度

// 定义课程信息结构体
typedef struct course_info {
    int id; // 课程编号
    char name[MAX_LEN]; // 课程名称
    char property[MAX_LEN]; // 课程性质
    float credit; // 学分
    int semester; // 开课学期
    struct course_info *next; // 指向下一个节点的指针
} CourseInfo;

// 定义全局变量，表示链表的头节点
CourseInfo *head = NULL;

// 函数声明
void display_menu();
void add_course_info();
void search_course_info();
void update_course_info();
void delete_course_info();
void count_credit();
void display_course_info();

int main() {
    int choice;
    do {
        display_menu();
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                add_course_info();
                break;
            case 2:
                search_course_info();
                break;
            case 3:
                update_course_info();
                break;
            case 4:
                delete_course_info();
                break;
            case 5:
                count_credit();
                break;
            case 6:
                display_course_info();
                break;
            case 0:
                printf("Bye!\n");
                exit(0);
            default:
                printf("Invalid choice!\n");
        }
    } while (1);
    return 0;
}

// 显示菜单
void display_menu() {
    printf("\n");
    printf("Course Information Management System\n");
    printf("-------------------------------------\n");
    printf("1. Add Course Info\n");
    printf("2. Search Course Info\n");
    printf("3. Update Course Info\n");
    printf("4. Delete Course Info\n");
    printf("5. Count Credit\n");
    printf("6. Display Course Info\n");
    printf("0. Exit\n");
    printf("-------------------------------------\n");
    printf("Please enter your choice: ");
}

// 输入记录：课程信息录入功能
void add_course_info() {
    CourseInfo *p = (CourseInfo *) malloc(sizeof(CourseInfo));
    if (p == NULL) {
        printf("Memory allocation failed!\n");
        return;
    }
    printf("Please enter the course ID: ");
    scanf("%d", &(p->id));
    printf("Please enter the course name: ");
    scanf("%s", p->name);
    printf("Please enter the course property: ");
    scanf("%s", p->property);
    printf("Please enter the course credit: ");
    scanf("%f", &(p->credit));
    printf("Please enter the semester: ");
    scanf("%d", &(p->semester));
    p->next = head;
    head = p;
    printf("Add course info successfully!\n");
}

// 查询记录：用户可以按课程名或者课程性质进行查询
void search_course_info() {
    char keyword[MAX_LEN];
    printf("Please enter the keyword: ");
    scanf("%s", keyword);
    CourseInfo *p = head;
    int count = 0;
    while (p != NULL) {
        if (strcmp(keyword, p->name) == 0 || strcmp(keyword, p->property) == 0) {
            printf("%d\t%s\t%s\t%.2f\t%d\n", p->id, p->name, p->property, p->credit, p->semester);
            count++;
        }
        p = p->next;
    }
    if (count == 0) {
        printf("No course info found!\n");
    }
}

// 更新记录：对课程信息进行修改、删除、插入操作
void update_course_info() {
    int id, choice;
    printf("Please enter the course ID: ");
    scanf("%d", &id);
    CourseInfo *p = head;
    while (p != NULL) {
        if (p->id == id) {
            printf("Course Info:\n");
            printf("%d\t%s\t%s\t%.2f\t%d\n", p->id, p->name, p->property, p->credit, p->semester);
            printf("1. Update Course Name\n");
            printf("2. Update Course Property\n");
            printf("3. Update Course Credit\n");
            printf("4. Update Semester\n");
            printf("5. Delete Course Info\n");
            printf("0. Back to Menu\n");
            printf("Please enter your choice: ");
            scanf("%d", &choice);
            switch (choice) {
                case 1:
                    printf("Please enter the new course name: ");
                    scanf("%s", p->name);
                    printf("Update course name successfully!\n");
                    break;
                case 2:
                    printf("Please enter the new course property: ");
                    scanf("%s", p->property);
                    printf("Update course property successfully!\n");
                    break;
                case 3:
                    printf("Please enter the new course credit: ");
                    scanf("%f", &(p->credit));
                    printf("Update course credit successfully!\n");
                    break;
                case 4:
                    printf("Please enter the new semester: ");
                    scanf("%d", &(p->semester));
                    printf("Update semester successfully!\n");
                    break;
                case 5:
                    if (p == head) {
                        head = head->next;
                    } else {
                        CourseInfo *prev = head;
                        while (prev->next != p) {
                            prev = prev->next;
                        }
                        prev->next = p->next;
                    }
                    free(p);
                    printf("Delete course info successfully!\n");
                    break;
                case 0:
                    return;
                default:
                    printf("Invalid choice!\n");
            }
            return;
        }
        p = p->next;
    }
    printf("Course info not found!\n");
}

// 删除记录
void delete_course_info() {
    int id;
    printf("Please enter the course ID: ");
    scanf("%d", &id);
    CourseInfo *p = head;
    CourseInfo *prev = NULL;
    while (p != NULL) {
        if (p->id == id) {
            if (prev == NULL) {
                head = p->next;
            } else {
                prev->next = p->next;
            }
            free(p);
            printf("Delete course info successfully!\n");
            return;
        }
        prev = p;
        p = p->next;
    }
    printf("Course info not found!\n");
}

// 统计记录：对学期课程总学分进行统计
void count_credit() {
    int semester;
    float total_credit = 0;
    printf("Please enter the semester: ");
    scanf("%d", &semester);
    CourseInfo *p = head;
    while (p != NULL) {
        if (p->semester == semester) {
            total_credit += p->credit;
        }
        p = p->next;
    }
    printf("Total credit of semester %d is %.2f\n", semester, total_credit);
}

// 输出记录：实现对记录的存盘操作，将存储记录以表格的形式在屏幕上打印
void display_course_info() {
    CourseInfo *p = head;
    printf("ID\tName\tProperty\tCredit\tSemester\n");
    while (p != NULL) {
        printf("%d\t%s\t%s\t%.2f\t%d\n", p->id, p->name, p->property, p->credit, p->semester);
        p = p->next;
    }
}

注意事项：

1. 在输入、更新、查询等操作时，需要对用户的输入进行合法性检查，防止输入错误的数据导致程序崩溃。

2. 在存档时需要将链表中的所有数据保存到文件中，以便下次程序启动时能够读取之前的数据。

3. 为了程序的易用性，可以添加用户友好的界面，让用户更方便地进行操作。