实验4
#include<iostream> #include<string> using std::string; class TextCoder { private: string text; void encoder(); void decoder(); public: TextCoder(string &str); TextCoder(const TextCoder &t); string get_ciphertext(); string get_deciphertext(); }; TextCoder::TextCoder(string &str) : text{str} { } TextCoder::TextCoder(const TextCoder &t) : text{t.text} { } void TextCoder::encoder() { for (auto &i : text) { if (i >= 'a' && i <= 'z') i = 'a' + ((i - 'a') + 7) % 26; else if (i >= 'A' && i <= 'Z') i = 'A' + ((i - 'A') + 7) % 26; } } void TextCoder::decoder() { for (auto &i : text) { if (i >= 'a' && i <= 'z') i = 'a' + ((i - 'a') + 26 - 7) % 26; else if (i >= 'A' && i <= 'Z') i = 'A' + ((i - 'A') + 26 - 7) % 26; } } string TextCoder::get_ciphertext() { encoder(); return text; } string TextCoder::get_deciphertext() { decoder(); return text; }
#include "textcoder.hpp" #include <iostream> #include <string> void test() { using namespace std; string text, encoded_text, decoded_text; cout << "输入英文文本: "; while (getline(cin, text)) { encoded_text = TextCoder(text).get_ciphertext(); // 这里使用的是临时无名对象 cout << "加密后英文文本:\t" << encoded_text << endl; decoded_text = TextCoder(encoded_text).get_deciphertext(); // 这里使用的是临时无名对象 cout << "解密后英文文本:\t" << decoded_text << endl; cout << "\n输入英文文本: "; } } int main() { test(); }
#include<iostream> using std::string; class Info { private: string nickname; string contact; string city; int n; public: Info(string&,string&,string&,int&); void print(); }; Info::Info(string &nickname,string &contact,string &city,int &n) { this->nickname = nickname; this->contact = contact; this->city = city; this->n = n; } void Info::print() { std::cout<<"昵称:\t\t"<<nickname<<std::endl; std::cout<<"联系方式:\t"<<contact<<std::endl; std::cout<<"所在城市:\t"<<city<<std::endl; std::cout<<"预定人数:\t"<<n<<std::endl; }
#include <iostream> #include <string> #include <vector> #include"Info.hpp" using namespace std; int main() { const int capacity = 100; vector<Info> audience_info_list; vector<Info> &v = audience_info_list; int sum = 0; cout << "录入信息:\n\n"; cout << "昵称\t\t"; cout << "联系方式(邮箱/手机号)\t\t"; cout << "所在城市\t"; cout << "预定人数" << endl; string nickname, contact, city; int n; while (cin >> nickname >> contact >> city >> n) { if (sum + n <= capacity) { Info a(nickname, contact, city, n); v.push_back(a); sum += n; } else { cout << "对不起,只剩" << capacity - sum << "个位置。\n"; cout << "1.输入u,更新(updata)预定信息" << endl; cout << "2.输入q,退出预定" << endl; cout << "你的选择:"; char c; cin >> c; if (c == 'q') break; else if (c == 'u') continue; else break; } if (sum == capacity) break; } cout << endl; cout << "截至目前,一共有" << sum << "位听众预定参加。"; if (sum != 0) { cout << "预定听众信息如下:" << endl; for (int i = 0; i < v.size(); i++) { v[i].print(); cout << endl; } } }