C语言学生信息管理系统

好的，那你需要一个学生信息的数据结构，比如：

typedef struct {
    char name[20];
    int age;
    char gender[10];
    char id[20];
    float score;
} Student;

然后你可以定义一个数组来存储多个学生的信息：

#define MAX_STUDENTS 100
Student students[MAX_STUDENTS];
int num_students = 0;

接着你可以编写一些函数来实现学生信息的增删改查操作：

void add_student() {
    if (num_students >= MAX_STUDENTS) {
        printf("Error: student database full!\n");
        return;
    }
    Student s;
    printf("Enter student name: ");
    scanf("%s", s.name);
    printf("Enter student age: ");
    scanf("%d", &s.age);
    printf("Enter student gender: ");
    scanf("%s", s.gender);
    printf("Enter student ID: ");
    scanf("%s", s.id);
    printf("Enter student score: ");
    scanf("%f", &s.score);
    students[num_students++] = s;
    printf("Student added successfully!\n");
}

void print_student(Student s) {
    printf("%s\t%d\t%s\t%s\t%.2f\n", s.name, s.age, s.gender, s.id, s.score);
}

void list_students() {
    if (num_students == 0) {
        printf("No students to show!\n");
        return;
    }
    printf("Name\tAge\tGender\tID\tScore\n");
    for (int i = 0; i < num_students; i++) {
        print_student(students[i]);
    }
}

void search_student() {
    char id[20];
    printf("Enter student ID: ");
    scanf("%s", id);
    for (int i = 0; i < num_students; i++) {
        if (strcmp(students[i].id, id) == 0) {
            printf("Student found:\n");
            print_student(students[i]);
            return;
        }
    }
    printf("Student not found!\n");
}

void delete_student() {
    char id[20];
    printf("Enter student ID: ");
    scanf("%s", id);
    for (int i = 0; i < num_students; i++) {
        if (strcmp(students[i].id, id) == 0) {
            for (int j = i + 1; j < num_students; j++) {
                students[j - 1] = students[j];
            }
            num_students--;
            printf("Student deleted successfully!\n");
            return;
        }
    }
    printf("Student not found!\n");
}

void update_student() {
    char id[20];
    printf("Enter student ID: ");
    scanf("%s", id);
    for (int i = 0; i < num_students; i++) {
        if (strcmp(students[i].id, id) == 0) {
            printf("Enter new student name (press enter to skip): ");
            scanf("%s", students[i].name);
            printf("Enter new student age (press 0 to skip): ");
            scanf("%d", &students[i].age);
            printf("Enter new student gender (press enter to skip): ");
            scanf("%s", students[i].gender);
            printf("Enter new student score (press 0.0 to skip): ");
            scanf("%f", &students[i].score);
            printf("Student updated successfully!\n");
            return;
        }
    }
    printf("Student not found!\n");
}

最后，在`main`函数中编写一个简单的菜单来调用这些函数：

int main() {
    int choice;
    while (1) {
        printf("1. Add student\n");
        printf("2. List students\n");
        printf("3. Search student\n");
        printf("4. Delete student\n");
        printf("5. Update student\n");
        printf("6. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                add_student();
                break;
            case 2:
                list_students();
                break;
            case 3:
                search_student();
                break;
            case 4:
                delete_student();
                break;
            case 5:
                update_student();
                break;
            case 6:
                return 0;
            default:
                printf("Invalid choice!\n");
        }
    }
}

这样，你就完成了一个简单的学生信息管理系统。