学生信息管理系统c语言程序设计代码

好的，这里提供一份简单的学生信息管理系统C语言程序设计代码，希望能够对您有帮助：

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

#define MAX_STUDENT_NUM 1000

typedef struct {
    char name[20];
    char id[10];
    char className[10];
    int score;
} Student;

void addStudent(Student *students, int *num);
void deleteStudent(Student *students, int *num);
void modifyStudent(Student *students, int num);
void queryStudents(Student *students, int num);
void sortStudents(Student *students, int num);

int main() {
    Student students[MAX_STUDENT_NUM];
    int num = 0;
    int choice;

    while (1) {
        printf("1. Add student\n");
        printf("2. Delete student\n");
        printf("3. Modify student information\n");
        printf("4. Query student information\n");
        printf("5. Sort student by score\n");
        printf("0. Quit\n");
        printf("Please enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addStudent(students, &num);
                break;
            case 2:
                deleteStudent(students, &num);
                break;
            case 3:
                modifyStudent(students, num);
                break;
            case 4:
                queryStudents(students, num);
                break;
            case 5:
                sortStudents(students, num);
                break;
            case 0:
                exit(0);
            default:
                printf("Invalid choice\n");
        }
    }

    return 0;
}

void addStudent(Student *students, int *num) {
    if (*num >= MAX_STUDENT_NUM) {
        printf("Exceed maximum number of students\n");
        return;
    }

    printf("Please enter student name: ");
    scanf("%s", students[*num].name);
    printf("Please enter student ID: ");
    scanf("%s", students[*num].id);
    printf("Please enter student class name: ");
    scanf("%s", students[*num].className);
    printf("Please enter student score: ");
    scanf("%d", &students[*num].score);

    (*num)++;
    printf("Successfully added a student\n");
}

void deleteStudent(Student *students, int *num) {
    char id[10];
    int i, j;

    printf("Please enter the ID of the student to be deleted: ");
    scanf("%s", id);

    for (i = 0; i < *num; i++) {
        if (strcmp(students[i].id, id) == 0) {
            for (j = i; j < *num - 1; j++) {
                students[j] = students[j + 1];
            }
            (*num)--;
            printf("Successfully deleted the student\n");
            return;
        }
    }

    printf("Cannot find the student with the ID\n");
}

void modifyStudent(Student *students, int num) {
    char id[10];
    int i;

    printf("Please enter the ID of the student to be modified: ");
    scanf("%s", id);

    for (i = 0; i < num; i++) {
        if (strcmp(students[i].id, id) == 0) {
            printf("Please enter the new student name: ");
            scanf("%s", students[i].name);
            printf("Please enter the new student class name: ");
            scanf("%s", students[i].className);
            printf("Please enter the new student score: ");
            scanf("%d", &students[i].score);
            printf("Successfully modified the student information\n");
            return;
        }
    }

    printf("Cannot find the student with the ID\n");
}

void queryStudents(Student *students, int num) {
    char id[10];
    int i;

    printf("Please enter the ID of the student to be queried (enter 0 to list all students): ");
    scanf("%s", id);

    if (strcmp(id, "0") == 0) {
        printf("Name\t\tID\t\tClass\t\tScore\n");
        for (i = 0; i < num; i++) {
            printf("%-16s%-12s%-12s%d\n", students[i].name, students[i].id, students[i].className, students[i].score);
        }
    } else {
        for (i = 0; i < num; i++) {
            if (strcmp(students[i].id, id) == 0) {
                printf("Name\t\tID\t\tClass\t\tScore\n");
                printf("%-16s%-12s%-12s%d\n", students[i].name, students[i].id, students[i].className, students[i].score);
                return;
            }
        }
        printf("Cannot find the student with the ID\n");
    }
}

void sortStudents(Student *students, int num) {
    int i, j;
    Student temp;

    for (i = 0; i < num - 1; i++) {
        for (j = 0; j < num - i - 1; j++) {
            if (students[j].score < students[j + 1].score) {
                temp = students[j];
                students[j] = students[j + 1];
                students[j + 1] = temp;
            }
        }
    }

    printf("Successfully sorted the students by score\n");
}

该程序实现了以下功能:

1. 添加学生信息
2. 删除学生信息
3. 修改学生信息
4. 查询学生信息
5. 按照成绩排序学生信息

注意事项：

1. 该程序只是一个简单的示例，实际情况下需要根据具体需求进行修改和完善。
2. 该程序中使用了结构体来存储学生信息，可以根据需要进行修改。
3. 该程序中使用了一个宏定义来限制最大学生数量，可以根据需要进行修改。