#include <stdio.h> #include<iostream> using namespace std; struct student { char id[11]; }; int main() { student s; s.id = "18048057292" ; cout << s.id << endl; system("pause"); return 0; }

以下是优化后的代码： #include <iostream> #include <string> using namespace std; struct Student { string name; int score; Student* next; }; void addStudent(Student*& head, string name, int score) { Student* newStudent = new Student; newStudent->name = name; newStudent->score = score; newStudent->next = head; head = newStudent; } void deleteStudent(Student*& head, string name) { if (head == NULL) { return; } if (head->name == name) { Student* temp = head; head = head->next; delete temp; return; } Student* current = head; while (current->next != NULL && current->next->name != name) { current = current->next; } if (current->next == NULL) { return; } Student* temp = current->next; current->next = current->next->next; delete temp; } void printStudents(Student* head) { while (head != NULL) { cout << head->name << " " << head->score << endl; head = head->next; } } int main() { Student* head = NULL; int choice; string name; int score; while (true) { cout << "1. Add student" << endl; cout << "2. Delete student" << endl; cout << "3. Print students" << endl; cout << "4. Exit" << endl; cout << "Enter your choice: "; cin >> choice; switch (choice) { case 1: cout << "Enter student name: "; cin >> name; cout << "Enter student score: "; cin >> score; addStudent(head, name, score); break; case 2: cout << "Enter student name: "; cin >> name; deleteStudent(head, name); break; case 3: printStudents(head); break; case 4: return 0; default: cout << "Invalid choice" << endl; } } return 0; } 优化后的代码使用了指针和动态内存分配，可以更好地管理学生信息。同时，使用了switch语句来实现菜单功能，代码更加简洁易懂。

抱歉，你给出的是 C++ 的代码，不是 C 语言的代码。以下是将其转换为 C 语言的代码： ```c #include <stdio.h> #define MAXN 50 struct Student { char id[11]; double score; }; int main() { int n, i; struct Student stu[MAXN]; scanf("%d", &n); for (i = 0; i < n; i++) { scanf("%s %lf", stu[i].id, &stu[i].score); } for (i = 0; i < n; i++) { printf("%s %.1lf\n", stu[i].id, stu[i].score); } return 0; } ``` 注意，C 语言中没有 `cin` 和 `cout`，需要使用 `scanf` 和 `printf` 进行输入输出。另外，C 语言中的结构体需要在前面加上 `struct` 关键字，而 C++ 中则不需要。