struct框架实现增删改查

好的，这是一个常见的问题，我可以为您提供一个简单的 struct 实现增删改查的框架，具体实现可能需要根据具体需求进行修改：

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

#define MAX_LEN 100

/* 定义结构体 */
struct student {
    char name[MAX_LEN];
    int age;
    float score;
};

/* 定义全局变量 */
int count = 0;  // 学生数量
struct student students[MAX_LEN];

/* 函数声明 */
void add_student(void);
void delete_student(void);
void modify_student(void);
void search_student(void);
void print_student(void);

int main(void) {
    int choice;

    /* 循环菜单 */
    while (1) {
        printf("\nMenu:\n");
        printf("1. Add student\n");
        printf("2. Delete student\n");
        printf("3. Modify student\n");
        printf("4. Search student\n");
        printf("5. Print all students\n");
        printf("6. Exit\n");
        printf("Please enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
        case 1:
            add_student();
            break;
        case 2:
            delete_student();
            break;
        case 3:
            modify_student();
            break;
        case 4:
            search_student();
            break;
        case 5:
            print_student();
            break;
        case 6:
            return 0;
        default:
            printf("Invalid choice!\n");
            break;
        }
    }
}

/* 添加学生 */
void add_student(void) {
    if (count >= MAX_LEN) {
        printf("The number of students has reached the maximum!\n");
        return;
    }

    struct student s;
    printf("Please enter student name: ");
    scanf("%s", s.name);
    printf("Please enter student age: ");
    scanf("%d", &s.age);
    printf("Please enter student score: ");
    scanf("%f", &s.score);

    students[count++] = s;
    printf("Student added successfully!\n");
}

/* 删除学生 */
void delete_student(void) {
    char name[MAX_LEN];
    printf("Please enter student name to delete: ");
    scanf("%s", name);

    for (int i = 0; i < count; i++) {
        if (strcmp(students[i].name, name) == 0) {
            /* 将最后一个学生覆盖当前学生，然后数量减一 */
            students[i] = students[--count];
            printf("Student deleted successfully!\n");
            return;
        }
    }

    printf("Student not found!\n");
}

/* 修改学生信息 */
void modify_student(void) {
    char name[MAX_LEN];
    printf("Please enter student name to modify: ");
    scanf("%s", name);

    for (int i = 0; i < count; i++) {
        if (strcmp(students[i].name, name) == 0) {
            printf("Please enter new age: ");
            scanf("%d", &students[i].age);
            printf("Please enter new score: ");
            scanf("%f", &students[i].score);
            printf("Student modified successfully!\n");
            return;
        }
    }

    printf("Student not found!\n");
}

/* 查找学生信息 */
void search_student(void) {
    char name[MAX_LEN];
    printf("Please enter student name to search: ");
    scanf("%s", name);

    for (int i = 0; i < count; i++) {
        if (strcmp(students[i].name, name) == 0) {
            printf("Name: %s, Age: %d, Score: %.2f\n", students[i].name, students[i].age, students[i].score);
            return;
        }
    }

    printf("Student not found!\n");
}

/* 打印所有学生信息 */
void print_student(void) {
    if (count == 0) {
        printf("No students!\n");
        return;
    }

    printf("All students:\n");
    for (int i = 0; i < count; i++) {
        printf("Name: %s, Age: %d, Score: %.2f\n", students[i].name, students[i].age, students[i].score);
    }
}

这个代码框架实现了一个简单的学生管理系统，可以实现添加、删除、修改、查找和打印学生信息的功能。您可以根据实际需要进行修改和扩展。