题目：学生基本信息管理c语言代码 内容：给出n个学生的m门考试的成绩表，每个学生的信息由学号、姓名以及各科成绩组成。对学生的考试成绩进行有关统计，并打印统计表。具体功能如下： 主要功能： (1)具有对学生信息的增、删（按学号）、查（按学号、姓名）、改（按学号）功 能。 (2)按总分高低次序，打印出名次表，总分相同的为同一名次； (3)按名次打印出每个学生的学号、姓名、总分以及各科成缋。 (4)输出每科课程的平均成绩。

以下是学生基本信息管理的C语言代码：

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

#define MAX_STUDENT_NUMBER 100
#define NAME_LENGTH 20

typedef struct {
    int id;
    char name[NAME_LENGTH];
    int score[3];
    int totalScore;
    int rank;
} Student;

Student students[MAX_STUDENT_NUMBER];
int studentCount = 0;

void addStudent() {
    if (studentCount >= MAX_STUDENT_NUMBER) {
        printf("无法添加更多学生\n");
        return;
    }

    printf("请输入学生信息：\n");

    Student student;
    printf("学号：");
    scanf("%d", &student.id);
    printf("姓名：");
    scanf("%s", student.name);
    printf("三门课程成绩：");
    scanf("%d %d %d", &student.score[0], &student.score[1], &student.score[2]);

    student.totalScore = student.score[0] + student.score[1] + student.score[2];
    student.rank = 1;

    students[studentCount] = student;
    studentCount++;

    printf("添加成功\n");
}

void deleteStudent() {
    int id;
    printf("请输入要删除学生的学号：");
    scanf("%d", &id);

    int index = -1;
    for (int i = 0; i < studentCount; i++) {
        if (students[i].id == id) {
            index = i;
            break;
        }
    }

    if (index == -1) {
        printf("未找到对应学生\n");
        return;
    }

    for (int i = index; i < studentCount - 1; i++) {
        students[i] = students[i + 1];
    }
    studentCount--;

    printf("删除成功\n");
}

void searchStudentById() {
    int id;
    printf("请输入要查询学生的学号：");
    scanf("%d", &id);

    for (int i = 0; i < studentCount; i++) {
        if (students[i].id == id) {
            printf("学号：%d，姓名：%s，三门课程成绩：%d %d %d，总分：%d\n", 
                students[i].id, students[i].name, students[i].score[0], 
                students[i].score[1], students[i].score[2], students[i].totalScore);
            return;
        }
    }

    printf("未找到对应学生\n");
}

void searchStudentByName() {
    char name[NAME_LENGTH];
    printf("请输入要查询学生的姓名：");
    scanf("%s", name);

    for (int i = 0; i < studentCount; i++) {
        if (strcmp(students[i].name, name) == 0) {
            printf("学号：%d，姓名：%s，三门课程成绩：%d %d %d，总分：%d\n", 
                students[i].id, students[i].name, students[i].score[0], 
                students[i].score[1], students[i].score[2], students[i].totalScore);
        }
    }
}

void updateStudent() {
    int id;
    printf("请输入要修改学生的学号：");
    scanf("%d", &id);

    int index = -1;
    for (int i = 0; i < studentCount; i++) {
        if (students[i].id == id) {
            index = i;
            break;
        }
    }

    if (index == -1) {
        printf("未找到对应学生\n");
        return;
    }

    printf("请输入学生信息：\n");

    Student student;
    printf("学号：");
    scanf("%d", &student.id);
    printf("姓名：");
    scanf("%s", student.name);
    printf("三门课程成绩：");
    scanf("%d %d %d", &student.score[0], &student.score[1], &student.score[2]);

    student.totalScore = student.score[0] + student.score[1] + student.score[2];
    student.rank = 1;

    students[index] = student;

    printf("修改成功\n");
}

void printRank() {
    for (int i = 0; i < studentCount; i++) {
        students[i].rank = 1;
        for (int j = 0; j < studentCount; j++) {
            if (students[j].totalScore > students[i].totalScore) {
                students[i].rank++;
            }
        }
    }

    printf("名次  学号  姓名  总分\n");
    for (int i = 0; i < studentCount; i++) {
        printf("%d     %d    %s    %d\n", students[i].rank, students[i].id, 
            students[i].name, students[i].totalScore);
    }
}

void printStudent() {
    printf("请输入要查询的名次：");
    int rank;
    scanf("%d", &rank);

    printf("学号：%d，姓名：%s，三门课程成绩：%d %d %d，总分：%d\n", 
        students[rank - 1].id, students[rank - 1].name, students[rank - 1].score[0], 
        students[rank - 1].score[1], students[rank - 1].score[2], students[rank - 1].totalScore);
}

void printAverageScore() {
    float averageScore[3] = {0};
    for (int i = 0; i < studentCount; i++) {
        for (int j = 0; j < 3; j++) {
            averageScore[j] += students[i].score[j];
        }
    }

    for (int i = 0; i < 3; i++) {
        printf("第%d门课程平均成绩：%.2f\n", i + 1, averageScore[i] / studentCount);
    }
}

int main() {
    int choice;
    while (1) {
        printf("\n");
        printf("请选择操作：\n");
        printf("1. 添加学生信息\n");
        printf("2. 删除学生信息（按学号）\n");
        printf("3. 查询学生信息（按学号）\n");
        printf("4. 查询学生信息（按姓名）\n");
        printf("5. 修改学生信息\n");
        printf("6. 打印名次表\n");
        printf("7. 打印学生信息（按名次）\n");
        printf("8. 打印课程平均成绩\n");
        printf("9. 退出\n");

        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addStudent();
                break;
            case 2:
                deleteStudent();
                break;
            case 3:
                searchStudentById();
                break;
            case 4:
                searchStudentByName();
                break;
            case 5:
                updateStudent();
                break;
            case 6:
                printRank();
                break;
            case 7:
                printStudent();
                break;
            case 8:
                printAverageScore();
                break;
            case 9:
                exit(0);
            default:
                printf("无效的操作\n");
                break;
        }
    }

    return 0;
}

这个程序实现了对学生信息的增、删、查、改、打印名次表、打印学生信息和打印课程平均成绩等功能。具体实现细节可以参考代码注释。