实验3
实验任务5
1 #pragma once 2 3 #include<iostream> 4 #include<iomanip> 5 #include<string> 6 7 using std::cout; 8 using std::endl; 9 using std::cin; 10 using std::setw; 11 using std::string; 12 13 class Info{ 14 public: 15 Info(string name, string phone, string city_name, int number):nickname{name}, contact{phone}, city{city_name}, n{number} {} 16 void print(); 17 18 private: 19 string nickname; //昵称 20 string contact; // 联系方式 21 string city; // 所在城市 22 int n; // 预定参加人数 23 }; 24 25 void Info::print() { 26 cout << "昵称：" << nickname << endl; 27 cout << "联系方式： " << contact << endl; 28 cout << "所在城市：" << city << endl; 29 cout << "预定人数：" << n << endl; 30 cout << endl; 31 }
1 #include "Info.hpp" 2 #include<string> 3 #include<iostream> 4 #include<vector> 5 #include<iomanip> 6 #include<limits> 7 using namespace std; 8 9 class Liveshow{ 10 public: 11 void appointment(); 12 void print(); 13 14 private: 15 int nums = 0; 16 const int capacity = 100; // 最大容纳听众人数 17 vector<Info> audience_info_list; 18 }; 19 20 void Liveshow::appointment(){ 21 string title{"录入信息："}; 22 cout << title << endl << endl; 23 24 string s1{"昵称"}; 25 string s2{"联系方式（邮箱/手机号)"}; 26 string s3{"所在城市"}; 27 string s4{"预定参加人数"}; 28 29 cout << left << setw(30) << s1 30 << left << setw(30) << s2 31 << left << setw(30) << s3 32 << left << setw(30) << s4 ; 33 34 string name; 35 while(cin >> name){ 36 string contact, city; 37 int number; 38 cin >> contact; 39 cin >> city; 40 cin >> number; 41 if(nums+number >= capacity) { 42 cout << "对不起，只剩"<< capacity - nums <<"个位置。" << endl; 43 cout << "1. 输入u，更新(update)预定信息" << endl; 44 cout << "2. 输入q，退出预定" << endl; 45 cout << "你的选择："; 46 string choice; 47 cin >> choice; 48 cout << endl; 49 break; 50 }else{ 51 nums+=number; 52 } 53 audience_info_list.push_back(Info(name, contact, city, number)); 54 cin.ignore(numeric_limits<streamsize>::max(), '\n'); 55 } 56 57 print(); 58 } 59 60 void Liveshow::print() { 61 cout << "截至目前，一共有" << nums 62 << "位听众预定参加。预定听众信息如下：" << endl; 63 64 for(auto &item : audience_info_list) item.print(); 65 } 66 67 int main() 68 { 69 Liveshow show; 70 show. Appointment(); 71 }
程序运行结果截图：
实验任务6
1 #include<string> 2 3 using std::string; 4 5 class TextCoder{ 6 public: 7 TextCoder(string txt): text{txt} {} 8 string get_ciphertext(); 9 string get_deciphertext(); 10 11 private: 12 string text; 13 void encoder(); 14 void decoder(); 15 }; 16 17 void TextCoder::encoder(){ 18 for(int i = 0; i < text.size(); i++){ 19 if( (text.at(i) >= 'V' && text.at(i) <= 'Z') || (text.at(i) >= 'v' && text.at(i) <= 'z') ) 20 { 21 text.at(i) = text.at(i) - 21; 22 } 23 else if( (text.at(i) >= 'A' && text.at(i) <= 'U') || (text.at(i) >= 'a' && text.at(i) <= 'u') ){ 24 text.at(i) += 5; 25 } 26 } 27 } 28 29 void TextCoder::decoder(){ 30 for(int i = 0; i < text.size(); i++){ 31 if( (text.at(i) >= 'A' && text.at(i) <= 'E') || (text.at(i) >= 'a' && text.at(i) <= 'e') ) 32 { 33 text.at(i) = text.at(i) + 21; 34 } 35 else if( (text.at(i) >= 'F' && text.at(i) <= 'Z') || (text.at(i) >= 'f' && text.at(i) <= 'z') ){ 36 text.at(i) -= 5; 37 } 38 } 39 } 40 41 string TextCoder::get_ciphertext(){ 42 encoder(); 43 return text; 44 } 45 46 string TextCoder::get_deciphertext(){ 47 decoder(); 48 return text; 49 }
1 #include "textcoder.hpp" 2 #include <iostream> 3 #include <string> 4 5 void test() { 6 using namespace std; 7 8 string text, encoded_text, decoded_text; 9 10 cout << "输入英文文本: "; 11 while (getline(cin, text)) { 12 encoded_text = TextCoder(text).get_ciphertext(); // 这里使用的是临时无名对象 13 cout << "加密后英文文本:\t" << encoded_text << endl; 14 15 decoded_text = TextCoder(encoded_text).get_deciphertext(); // 这里使用的是临时无名对象 16 cout << "解密后英文文本:\t" << decoded_text << endl; 17 cout << "\n输入英文文本: "; 18 } 19 } 20 21 int main() { 22 test(); 23 }
运行结果截图：
实验总结：
通过这次实验我了解了string类库的多种函数的使用，也了解了array和vector库的多种构造和调用方法，以及两者的多种循环调用方式。
但我还是不能熟练的掌握和使用array以及vector库的多种功能。
