学生信息管理系统c语言

好的，你需要一个学生信息管理系统的C语言代码是吗？那我可以为你提供一些参考：

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

typedef struct student {
    char name[20];
    int id;
    int age;
    float score;
} Student;

void showMenu();
void addStudent(Student *students, int *count);
void showAllStudents(Student *students, int count);
void findStudentById(Student *students, int count);
void modifyStudentById(Student *students, int count);
void deleteStudentById(Student *students, int *count);

int main() {
    int choice;
    int count = 0;
    Student students[100];

    while (1) {
        showMenu();
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addStudent(students, &count);
                break;
            case 2:
                showAllStudents(students, count);
                break;
            case 3:
                findStudentById(students, count);
                break;
            case 4:
                modifyStudentById(students, count);
                break;
            case 5:
                deleteStudentById(students, &count);
                break;
            case 6:
                exit(0);
            default:
                printf("Invalid choice!\n");
                break;
        }
    }

    return 0;
}

void showMenu() {
    printf("\n");
    printf("********** MENU **********\n");
    printf("1. Add student\n");
    printf("2. Show all students\n");
    printf("3. Find student by id\n");
    printf("4. Modify student by id\n");
    printf("5. Delete student by id\n");
    printf("6. Exit\n");
    printf("****************************\n");
    printf("Enter your choice: ");
}

void addStudent(Student *students, int *count) {
    Student student;
    printf("\nEnter student name: ");
    scanf("%s", student.name);
    printf("Enter student id: ");
    scanf("%d", &student.id);
    printf("Enter student age: ");
    scanf("%d", &student.age);
    printf("Enter student score: ");
    scanf("%f", &student.score);
    students[*count] = student;
    (*count)++;
    printf("Student added successfully!\n");
}

void showAllStudents(Student *students, int count) {
    if (count == 0) {
        printf("\nNo students found!\n");
        return;
    }

    printf("\n%-20s%-10s%-10s%-10s\n", "Name", "ID", "Age", "Score");

    for (int i = 0; i < count; i++) {
        printf("%-20s%-10d%-10d%-10.2f\n", students[i].name, students[i].id, students[i].age, students[i].score);
    }
}

void findStudentById(Student *students, int count) {
    int id;
    printf("\nEnter student id: ");
    scanf("%d", &id);

    for (int i = 0; i < count; i++) {
        if (students[i].id == id) {
            printf("\n%-20s%-10s%-10s%-10s\n", "Name", "ID", "Age", "Score");
            printf("%-20s%-10d%-10d%-10.2f\n", students[i].name, students[i].id, students[i].age, students[i].score);
            return;
        }
    }

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

void modifyStudentById(Student *students, int count) {
    int id;
    printf("\nEnter student id: ");
    scanf("%d", &id);

    for (int i = 0; i < count; i++) {
        if (students[i].id == id) {
            printf("\nCurrent student:\n");
            printf("%-20s%-10s%-10s%-10s\n", "Name", "ID", "Age", "Score");
            printf("%-20s%-10d%-10d%-10.2f\n", students[i].name, students[i].id, students[i].age, students[i].score);

            printf("\nEnter new name (press Enter to keep current value): ");
            char name[20];
            fgets(name, 20, stdin);
            fgets(name, 20, stdin);
            if (strcmp(name, "\n") != 0) {
                strcpy(students[i].name, name);
            }

            printf("Enter new id (press 0 to keep current value): ");
            int newId;
            scanf("%d", &newId);
            if (newId != 0) {
                students[i].id = newId;
            }

            printf("Enter new age (press 0 to keep current value): ");
            int age;
            scanf("%d", &age);
            if (age != 0) {
                students[i].age = age;
            }

            printf("Enter new score (press 0.0 to keep current value): ");
            float score;
            scanf("%f", &score);
            if (score != 0.0) {
                students[i].score = score;
            }

            printf("Student modified successfully!\n");
            return;
        }
    }

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

void deleteStudentById(Student *students, int *count) {
    int id;
    printf("\nEnter student id: ");
    scanf("%d", &id);

    for (int i = 0; i < *count; i++) {
        if (students[i].id == id) {
            for (int j = i; j < *count - 1; j++) {
                students[j] = students[j + 1];
            }
            (*count)--;
            printf("Student deleted successfully!\n");
            return;
        }
    }

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

这是一个简单的学生信息管理系统，包括添加学生、显示所有学生、根据学号查找学生、修改学生信息和删除学生等功能。希望对你有所帮助。