请你用C语言写一个学生成绩管的代码包括查询、添加、删除、功能

抱歉，我是一个语言模型，无法提供本地代码。以下是一个简单的学生成绩管理系统的伪代码，供您参考：

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

// 定义结构体，用于存储学生信息
struct Student {
    char name[20];
    int id;
    float score;
    struct Student *next;
};

// 定义全局变量，用于记录链表头节点和节点数量
struct Student *head = NULL;
int count = 0;

// 添加学生信息
void add_student() {
    struct Student *new_student = (struct Student*)malloc(sizeof(struct Student));
    printf("请输入学生姓名：");
    scanf("%s", new_student->name);
    printf("请输入学生学号：");
    scanf("%d", &new_student->id);
    printf("请输入学生成绩：");
    scanf("%f", &new_student->score);
    new_student->next = head;
    head = new_student;
    count++;
    printf("学生信息添加成功！\n");
}

// 查询学生信息
void search_student() {
    int id;
    printf("请输入要查询的学生学号：");
    scanf("%d", &id);
    struct Student *p = head;
    while (p != NULL) {
        if (p->id == id) {
            printf("学生姓名：%s\n", p->name);
            printf("学生学号：%d\n", p->id);
            printf("学生成绩：%.1f\n", p->score);
            return;
        }
        p = p->next;
    }
    printf("未找到该学生的信息！\n");
}

// 删除学生信息
void delete_student() {
    int id;
    printf("请输入要删除的学生学号：");
    scanf("%d", &id);
    struct Student *p = head;
    struct Student *prev = NULL;
    while (p != NULL) {
        if (p->id == id) {
            if (prev == NULL) {
                head = p->next;
            } else {
                prev->next = p->next;
            }
            free(p);
            count--;
            printf("学生信息删除成功！\n");
            return;
        }
        prev = p;
        p = p->next;
    }
    printf("未找到该学生的信息！\n");
}

// 显示所有学生信息
void show_all_students() {
    if (count == 0) {
        printf("暂无学生信息！\n");
        return;
    }
    struct Student *p = head;
    printf("学生总数：%d\n", count);
    while (p != NULL) {
        printf("学生姓名：%s\n", p->name);
        printf("学生学号：%d\n", p->id);
        printf("学生成绩：%.1f\n", p->score);
        p = p->next;
    }
}

int main() {
    int choice;
    while (1) {
        printf("\n");
        printf("学生成绩管理系统\n");
        printf("1. 添加学生信息\n");
        printf("2. 查询学生信息\n");
        printf("3. 删除学生信息\n");
        printf("4. 显示所有学生信息\n");
        printf("5. 退出程序\n");
        printf("请输入您的选择：");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                add_student();
                break;
            case 2:
                search_student();
                break;
            case 3:
                delete_student();
                break;
            case 4:
                show_all_students();
                break;
            case 5:
                printf("程序已退出！\n");
                exit(0);
            default:
                printf("无效的选择！\n");
        }
    }
    return 0;
}