C语言定义并创建一个包含学生信息（学号，姓名，成绩）的顺序表，使其具有如下功能： (1）根据指定学生个数，逐个输入学生信息并以顺序结构存储； (2）逐个显示学生表中所有学生的相关信息； (3）根据姓名进行查找，返回此学生的学号和成绩； (4）根据指定的位置可返回相应的学生信息（学号，姓名，成绩)(5）给定一个学生信息，插入到表中指定的位置； (6）删除指定位置的学生记录； (7）统计表中学生个数

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

#define MAX_SIZE 100

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

struct StudentList {
struct Student student[MAX_SIZE];
int length;
};

void init(struct StudentList *list) {
list->length = 0;
}

void add(struct StudentList *list) {
int n, i;
printf("请输入学生个数：");
scanf("%d", &n);

for (i = 0; i < n; i++) {
printf("请输入第%d个学生的信息：\n", i + 1);
printf("学号：");
scanf("%d", &list->student[i].id);
printf("姓名：");
scanf("%s", list->student[i].name);
printf("成绩：");
scanf("%d", &list->student[i].score);
list->length++;
}
}

void show(struct StudentList *list) {
int i;
printf("学号\t姓名\t成绩\n");
for (i = 0; i < list->length; i++) {
printf("%d\t%s\t%d\n", list->student[i].id, list->student[i].name, list->student[i].score);
}
}

void find(struct StudentList *list) {
char name[10];
int i, flag = 0;
printf("请输入要查找的学生姓名：");
scanf("%s", name);

for (i = 0; i < list->length; i++) {
if (strcmp(list->student[i].name, name) == 0) {
printf("学号：%d，成绩：%d\n", list->student[i].id, list->student[i].score);
flag = 1;
break;
}
}
if (!flag) {
printf("未找到该学生！\n");
}
}

void get(struct StudentList *list) {
int index;
printf("请输入要查询的位置：");
scanf("%d", &index);

if (index < 1 || index > list->length) {
printf("位置不合法！\n");
} else {
printf("学号：%d，姓名：%s，成绩：%d\n", list->student[index - 1].id, list->student[index - 1].name, list->student[index - 1].score);
}
}

void insert(struct StudentList *list) {
int index, i;
struct Student s;

printf("请输入要插入的位置：");
scanf("%d", &index);

if (index < 1 || index > list->length + 1) {
printf("位置不合法！\n");
} else {
printf("请输入要插入的学生信息：\n");
printf("学号：");
scanf("%d", &s.id);
printf("姓名：");
scanf("%s", s.name);
printf("成绩：");
scanf("%d", &s.score);

for (i = list->length; i >= index; i--) {
list->student[i] = list->student[i - 1];
}
list->student[index - 1] = s;
list->length++;
}
}

void remove_student(struct StudentList *list) {
int index, i;

printf("请输入要删除的位置：");
scanf("%d", &index);

if (index < 1 || index > list->length) {
printf("位置不合法！\n");
} else {
for (i = index; i < list->length; i++) {
list->student[i - 1] = list->student[i];
}
list->length--;
}
}

void count(struct StudentList *list) {
printf("学生个数：%d\n", list->length);
}

int main() {
struct StudentList list;

init(&list);

int choice;
do {
printf("===================================\n");
printf("1. 添加学生\n");
printf("2. 显示学生\n");
printf("3. 查找学生\n");
printf("4. 获取学生信息\n");
printf("5. 插入学生信息\n");
printf("6. 删除学生信息\n");
printf("7. 统计学生个数\n");
printf("0. 退出\n");
printf("===================================\n");
printf("请输入您的选择：");
scanf("%d", &choice);

switch (choice) {
case 1:
add(&list);
break;
case 2:
show(&list);
break;
case 3:
find(&list);
break;
case 4:
get(&list);
break;
case 5:
insert(&list);
break;
case 6:
remove_student(&list);
break;
case 7:
count(&list);
break;
case 0:
printf("程序已退出！\n");
break;
default:
printf("输入有误，请重新输入！\n");
break;
}
} while (choice != 0);

return 0;
}