某班有M人（具体人数由键盘输入）参加期末考试，有N门课程（具体课程数由键盘输入）用C语言编程实现包括以下功能的菜单驱动的学生成绩管理系统。 录入每个学生的学号、姓名和各科成绩；分别计算每门课程及每个学生的总分和平均分；按照总分进行升序或者降序排序；按照学号升序排序；插入学生一条记录；按照姓名查找，并删除一条记录；查找并显示一条信息；输出每个学生的学号、姓名、各科成绩、总分和分均分；将学生记录写入到文件；从文件中读出学生记录。用dev-c++写程序

好的，下面是该程序的代码实现：

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

#define MAX_N 100
#define MAX_M 100

typedef struct {
    int id;
    char name[20];
    int score[MAX_N];
    int total_score;
    double average_score;
} Student;

int n, m;
Student students[MAX_M];

void input_students() {
    printf("请输入学生信息：\n");
    for (int i = 0; i < m; i++) {
        printf("请输入第%d个学生的学号：", i + 1);
        scanf("%d", &students[i].id);
        printf("请输入第%d个学生的姓名：", i + 1);
        scanf("%s", students[i].name);
        for (int j = 0; j < n; j++) {
            printf("请输入第%d个学生的第%d门成绩：", i + 1, j + 1);
            scanf("%d", &students[i].score[j]);
            students[i].total_score += students[i].score[j];
        }
        students[i].average_score = (double) students[i].total_score / n;
    }
}

void calculate_scores() {
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            int score = students[i].score[j];
            int total_score = students[i].total_score;
            double average_score = students[i].average_score;
            int count = m;
            for (int k = 0; k < m; k++) {
                if (students[k].score[j] == 0) {
                    count--;
                }
            }
            double average = (double) (total_score - score) / (n - 1) * count / m;
            students[i].average_score = average;
        }
    }
}

void sort_by_total_score(int is_descending) {
    for (int i = 0; i < m - 1; i++) {
        for (int j = 0; j < m - i - 1; j++) {
            int s1 = students[j].total_score;
            int s2 = students[j + 1].total_score;
            if ((is_descending && s1 < s2) || (!is_descending && s1 > s2)) {
                Student tmp = students[j];
                students[j] = students[j + 1];
                students[j + 1] = tmp;
            }
        }
    }
}

void sort_by_id() {
    for (int i = 0; i < m - 1; i++) {
        for (int j = 0; j < m - i - 1; j++) {
            int id1 = students[j].id;
            int id2 = students[j + 1].id;
            if (id1 > id2) {
                Student tmp = students[j];
                students[j] = students[j + 1];
                students[j + 1] = tmp;
            }
        }
    }
}

void insert_student() {
    printf("请输入要插入的学生信息：\n");
    printf("请输入学生的学号：");
    scanf("%d", &students[m].id);
    printf("请输入学生的姓名：");
    scanf("%s", students[m].name);
    for (int j = 0; j < n; j++) {
        printf("请输入学生的第%d门成绩：", j + 1);
        scanf("%d", &students[m].score[j]);
        students[m].total_score += students[m].score[j];
    }
    students[m].average_score = (double) students[m].total_score / n;
    m++;
}

void delete_student() {
    char name[20];
    printf("请输入要删除的学生姓名：");
    scanf("%s", name);
    for (int i = 0; i < m; i++) {
        if (strcmp(name, students[i].name) == 0) {
            for (int j = i; j < m - 1; j++) {
                students[j] = students[j + 1];
            }
            m--;
            printf("删除成功！\n");
            return;
        }
    }
    printf("未找到该学生！\n");
}

void search_student() {
    char name[20];
    printf("请输入要查找的学生姓名：");
    scanf("%s", name);
    for (int i = 0; i < m; i++) {
        if (strcmp(name, students[i].name) == 0) {
            printf("学号：%d\n", students[i].id);
            printf("姓名：%s\n", students[i].name);
            for (int j = 0; j < n; j++) {
                printf("第%d门成绩：%d\n", j + 1, students[i].score[j]);
            }
            printf("总分：%d\n", students[i].total_score);
            printf("平均分：%.2f\n", students[i].average_score);
            return;
        }
    }
    printf("未找到该学生！\n");
}

void output_students() {
    for (int i = 0; i < m; i++) {
        printf("学号：%d\n", students[i].id);
        printf("姓名：%s\n", students[i].name);
        for (int j = 0; j < n; j++) {
            printf("第%d门成绩：%d\n", j + 1, students[i].score[j]);
        }
        printf("总分：%d\n", students[i].total_score);
        printf("平均分：%.2f\n", students[i].average_score);
    }
}

void write_students_to_file() {
    FILE *fp = fopen("students.txt", "w");
    if (fp == NULL) {
        printf("打开文件失败！\n");
        return;
    }
    for (int i = 0; i < m; i++) {
        fprintf(fp, "%d\t%s", students[i].id, students[i].name);
        for (int j = 0; j < n; j++) {
            fprintf(fp, "\t%d", students[i].score[j]);
        }
        fprintf(fp, "\t%d\t%.2f\n", students[i].total_score, students[i].average_score);
    }
    fclose(fp);
    printf("学生记录已写入文件！\n");
}

void read_students_from_file() {
    FILE *fp = fopen("students.txt", "r");
    if (fp == NULL) {
        printf("打开文件失败！\n");
        return;
    }
    int count = 0;
    while (!feof(fp)) {
        fscanf(fp, "%d\t%s", &students[count].id, students[count].name);
        for (int j = 0; j < n; j++) {
            fscanf(fp, "\t%d", &students[count].score[j]);
            students[count].total_score += students[count].score[j];
        }
        students[count].average_score = (double) students[count].total_score / n;
        count++;
    }
    m = count;
    fclose(fp);
    printf("学生记录已从文件中读入！\n");
}

void print_menu() {
    printf("*************************\n");
    printf("*     学生成绩管理系统     *\n");
    printf("*************************\n");
    printf("* 1. 录入学生信息          *\n");
    printf("* 2. 计算各门课程及学生总分和平均分  *\n");
    printf("* 3. 按照总分进行升序排序      *\n");
    printf("* 4. 按照总分进行降序排序      *\n");
    printf("* 5. 按照学号进行升序排序      *\n");
    printf("* 6. 插入学生记录           *\n");
    printf("* 7. 按照姓名查找并删除一条记录  *\n");
    printf("* 8. 查找并显示一条信息       *\n");
    printf("* 9. 输出每个学生的学号、姓名、各科成绩、总分和平均分  *\n");
    printf("* 10. 将学生记录写入到文件    *\n");
    printf("* 11. 从文件中读出学生记录    *\n");
    printf("* 0. 退出程序             *\n");
    printf("*************************\n");
}

int main() {
    int choice;
    while (1) {
        print_menu();
        printf("请输入您的选择：");
        scanf("%d", &choice);
        switch (choice) {
            case 0:
                printf("程序已退出！\n");
                return 0;
            case 1:
                input_students();
                break;
            case 2:
                calculate_scores();
                printf("计算完成！\n");
                break;
            case 3:
                sort_by_total_score(0);
                printf("按总分升序排序完成！\n");
                break;
            case 4:
                sort_by_total_score(1);
                printf("按总分降序排序完成！\n");
                break;
            case 5:
                sort_by_id();
                printf("按学号升序排序完成！\n");
                break;
            case 6:
                insert_student();
                break;
            case 7:
                delete_student();
                break;
            case 8:
                search_student();
                break;
            case 9:
                output_students();
                break;
            case 10:
                write_students_to_file();
                break;
            case 11:
                read_students_from_file();
                break;
            default:
                printf("输入错误，请重新输入！\n");
                break;
        }
    }
    return 0;
}

注意，该程序实现了菜单驱动，用户可以根据需要选择不同的功能进行操作。你可以根据需要自行修改和完善该程序。