c++编程设计并实现一个C++联系人类：contact，该类有name，tel和postcode三个私有属性，为该类设计若干方法，包括构造函数、存取三个私有属性的函数、显示联系人信息的函数等。（2）设计并实现一个通讯录类：addressBook，该类包含一个存放所有联系人的容器（可以用实验5中的CArray类实现，也可以用STL的容器实现）。（3）为addressBook设计若干方法，包括显示所有联系人、增加联系人、删除联系人、插入联系人、查找联系人等函数，以及将所有联系人保存到文件和从文件中读取联系人的函数。（4）设计主函数，显示操作选择菜单，完成通讯录的显示、增加、查找、删除和保存等功能5.禁止使用vector

以下是实现联系人类和通讯录类的代码示例： ```c #include <iostream> #include <fstream> #include <string> #include <cstring> #include <cstdlib> #include <cstdio> using namespace std; const int MAX_NAME_LEN = 20; const int MAX_TEL_LEN = 15; const int MAX_POSTCODE_LEN = 10; const int MAX_CONTACTS_NUM = 100; class Contact { private: char name[MAX_NAME_LEN]; char tel[MAX_TEL_LEN]; char postcode[MAX_POSTCODE_LEN]; public: Contact(const char* n, const char* t, const char* p) { strncpy(name, n, MAX_NAME_LEN); strncpy(tel, t, MAX_TEL_LEN); strncpy(postcode, p, MAX_POSTCODE_LEN); } const char* getName() const { return name; } const char* getTel() const { return tel; } const char* getPostcode() const { return postcode; } void setName(const char* n) { strncpy(name, n, MAX_NAME_LEN); } void setTel(const char* t) { strncpy(tel, t, MAX_TEL_LEN); } void setPostcode(const char* p) { strncpy(postcode, p, MAX_POSTCODE_LEN); } void display() const { cout << "Name: " << name << endl; cout << "Tel: " << tel << endl; cout << "Postcode: " << postcode << endl; } }; class AddressBook { private: Contact* contacts[MAX_CONTACTS_NUM]; int numContacts; public: AddressBook() { numContacts = 0; for (int i = 0; i < MAX_CONTACTS_NUM; i++) { contacts[i] = NULL; } } ~AddressBook() { for (int i = 0; i < numContacts; i++) { delete contacts[i]; } } void addContact(Contact* c) { if (numContacts < MAX_CONTACTS_NUM) { contacts[numContacts++] = c; } } void deleteContact(int index) { if (index >= 0 && index < numContacts) { delete contacts[index]; for (int i = index; i < numContacts - 1; i++) { contacts[i] = contacts[i + 1]; } contacts[--numContacts] = NULL; } } void insertContact(int index, Contact* c) { if (index >= 0 && index < numContacts && numContacts < MAX_CONTACTS_NUM) { for (int i = numContacts; i > index; i--) { contacts[i] = contacts[i - 1]; } contacts[index] = c; numContacts++; } } Contact* findContact(const char* name) const { for (int i = 0; i < numContacts; i++) { if (strcmp(contacts[i]->getName(), name) == 0) { return contacts[i]; } } return NULL; } void displayAllContacts() const { for (int i = 0; i < numContacts; i++) { contacts[i]->display(); cout << endl; } } void saveToFile(const char* filename) const { ofstream fout(filename); if (fout.is_open()) { fout << numContacts << endl; for (int i = 0; i < numContacts; i++) { fout << contacts[i]->getName() << endl; fout << contacts[i]->getTel() << endl; fout << contacts[i]->getPostcode() << endl; } fout.close(); } } void loadFromFile(const char* filename) { ifstream fin(filename); if (fin.is_open()) { int n; fin >> n; fin.ignore(); for (int i = 0; i < n; i++) { char name[MAX_NAME_LEN]; char tel[MAX_TEL_LEN]; char postcode[MAX_POSTCODE_LEN]; fin.getline(name, MAX_NAME_LEN); fin.getline(tel, MAX_TEL_LEN); fin.getline(postcode, MAX_POSTCODE_LEN); Contact* c = new Contact(name, tel, postcode); addContact(c); } fin.close(); } } }; int main() { AddressBook book; int choice; do { cout << "1. Display all contacts" << endl; cout << "2. Add a contact" << endl; cout << "3. Find a contact" << endl; cout << "4. Delete a contact" << endl; cout << "5. Save to file" << endl; cout << "6. Load from file" << endl; cout << "0. Exit" << endl; cout << "Enter your choice: "; cin >> choice; switch (choice) { case 1: book.displayAllContacts(); break; case 2: char name[MAX_NAME_LEN]; char tel[MAX_TEL_LEN]; char postcode[MAX_POSTCODE_LEN]; cout << "Enter name: "; cin.ignore(); cin.getline(name, MAX_NAME_LEN); cout << "Enter tel: "; cin.getline(tel, MAX_TEL_LEN); cout << "Enter postcode: "; cin.getline(postcode, MAX_POSTCODE_LEN); Contact* c = new Contact(name, tel, postcode); book.addContact(c); break; case 3: char searchName[MAX_NAME_LEN]; cout << "Enter name to search: "; cin.ignore(); cin.getline(searchName, MAX_NAME_LEN); Contact* result = book.findContact(searchName); if (result != NULL) { result->display(); } else { cout << "Contact not found." << endl; } break; case 4: int index; cout << "Enter index to delete: "; cin >> index; book.deleteContact(index); break; case 5: char filename[100]; cout << "Enter filename to save: "; cin.ignore(); cin.getline(filename, 100); book.saveToFile(filename); break; case 6: char loadFilename[100]; cout << "Enter filename to load: "; cin.ignore(); cin.getline(loadFilename, 100); book.loadFromFile(loadFilename); break; case 0: break; default: cout << "Invalid choice." << endl; break; } } while (choice != 0); return 0; } ``` 这个程序实现了一个简单的通讯录，可以添加、删除、查找、显示所有联系人，并支持将联系人保存到文件和从文件中读取联系人。注意，这个程序使用了动态内存分配，需要在析构函数中释放内存。