数据结构学生成绩管理系统c语言代码

好的，下面是一个简单的数据结构学生成绩管理系统的C语言代码，供您参考：

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

#define MAX_NAME_LEN 20
#define MAX_STU_NUM 100

typedef struct student {
    char name[MAX_NAME_LEN];
    int id;
    int grade;
} Student;

void add_student(Student students[], int *num_students);
void delete_student(Student students[], int *num_students);
void search_student(Student students[], int num_students);
void print_all_students(Student students[], int num_students);

int main() {
    Student students[MAX_STU_NUM];
    int num_students = 0;
    int option;

    while (1) {
        printf("1. Add student\n");
        printf("2. Delete student\n");
        printf("3. Search student\n");
        printf("4. Print all students\n");
        printf("5. Exit\n");
        printf("Enter option: ");
        scanf("%d", &option);

        switch (option) {
            case 1:
                add_student(students, &num_students);
                break;
            case 2:
                delete_student(students, &num_students);
                break;
            case 3:
                search_student(students, num_students);
                break;
            case 4:
                print_all_students(students, num_students);
                break;
            case 5:
                exit(0);
            default:
                printf("Invalid option.\n");
                break;
        }
    }

    return 0;
}

void add_student(Student students[], int *num_students) {
    if (*num_students == MAX_STU_NUM) {
        printf("The student database is full.\n");
        return;
    }

    printf("Enter student name: ");
    scanf("%s", students[*num_students].name);

    printf("Enter student ID: ");
    scanf("%d", &students[*num_students].id);

    printf("Enter student grade: ");
    scanf("%d", &students[*num_students].grade);

    printf("Student added successfully.\n");
    (*num_students)++;
}

void delete_student(Student students[], int *num_students) {
    int id, i, j;

    printf("Enter student ID to delete: ");
    scanf("%d", &id);

    for (i = 0; i < *num_students; i++) {
        if (students[i].id == id) {
            for (j = i; j < *num_students - 1; j++) {
                strcpy(students[j].name, students[j + 1].name);
                students[j].id = students[j + 1].id;
                students[j].grade = students[j + 1].grade;
            }
            printf("Student deleted successfully.\n");
            (*num_students)--;
            return;
        }
    }

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

void search_student(Student students[], int num_students) {
    int id, i;

    printf("Enter student ID to search: ");
    scanf("%d", &id);

    for (i = 0; i < num_students; i++) {
        if (students[i].id == id) {
            printf("Name: %s\n", students[i].name);
            printf("ID: %d\n", students[i].id);
            printf("Grade: %d\n", students[i].grade);
            return;
        }
    }

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

void print_all_students(Student students[], int num_students) {
    int i;

    if (num_students == 0) {
        printf("No students found.\n");
        return;
    }

    printf("Name\tID\tGrade\n");

    for (i = 0; i < num_students; i++) {
        printf("%s\t%d\t%d\n", students[i].name, students[i].id, students[i].grade);
    }
}

这段代码实现了一个简单的学生成绩管理系统，包括添加学生、删除学生、搜索学生和打印所有学生信息等功能。在代码中，使用了一个结构体 `Student` 表示每个学生的信息，包括姓名、学号和成绩。同时，使用一个数组 `students[]` 存储所有学生的信息，使用一个变量 `num_students` 表示当前有多少个学生信息已经被存储。