实验任务1
task1
task1_1.cpp
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#include <iostream> using std::cout; using std::endl; class A{ public: A(int x0, int y0): x{ x0 }, y{ y0 } {} void show() const { cout << x << ", " << y << endl; } private: int x, y; }; class B{ public: B(double x0, double y0): x{ x0 }, y{ y0 } {} void show() const { cout << x << ", " << y << endl;} private: double x, y; }; void test() { cout << "测试类A: " << endl; A a(3, 4); a.show(); cout << "\n测试类B: " << endl; B b(3.2, 5.6); b.show(); } int main() { test(); }View Code
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task1_2.cpp
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#include <iostream> #include <string> using std::cout; using std::endl; template<typename T> class X{ public: X(T x0, T y0): x{x0}, y{y0} {} void show() const { cout << x << ", " << y << endl;} private: T x, y; }; void test() { cout << "测试1: 模板类抽象类型T用int实例化" << endl; X<int> x1(3, 4); x1.show(); cout << "\n测试2: 模板类抽象类型T用double实例化" << endl; X<double> x2(3.2, 5.6); x2.show(); cout << "\n测试3: 模板类抽象类型T用标准库中的string实例化" << endl; X<std::string> x3("hello", "c plus plus"); x3.show(); } int main() { test(); }View Code
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实验任务2
task2_1.cpp
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#include <iostream> #include <string> #include <limits> using namespace std; int main() { const int n = 10; string prompt = string(n, '*') + "Enter a string: " + string(n, '*') + '\n'; cout << "测试1:"; cout << prompt; string s1; cin >> s1; cout << "s1: " << s1 << endl; cin.ignore(numeric_limits<streamsize>::max(), '\n'); cout << "\n测试2:"; cout << prompt; getline(cin, s1); cout << "s1: " << s1 << endl; cout << "\n测试3:"; string s2, s3; cout << prompt; getline(cin, s2, ' '); getline(cin, s3); cout << "s2: " << s2 << endl; cout << "s3: " << s3 << endl; }View Code
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task2_2.cpp
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#include <iostream> #include <string> int main() { using namespace std; string s; cout << "Enter words: \n"; while( getline(cin, s) ) { for(auto &ch: s) ch = toupper(ch); cout << s << "\n"; } }View Code
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task2_3.cpp
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#include <iostream> #include <string> #include <algorithm> int main() { using namespace std; string s1; cout << "Enter words: \n"; getline(cin, s1); cout << "original words: \n"; cout << s1 <<endl; cout << "to uppercase: \n"; transform(s1.begin(), s1.end(), s1.begin(), ::toupper); cout << s1 << endl; }View Code
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task2_4.cpp
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#include <iostream> #include <string> int main() { using namespace std; string s1, s2; s1 = "nuist"; s1[0] = 'N'; s1.at(1) = 'U'; cout << boolalpha << (s1 == "nuist") << endl; cout << s1.length() << endl; cout << s1.size() << endl; s2 = s1 + ", 2050"; cout << s2 << endl; string email{"[email protected]"}; auto pos = email.find("@"); if (pos == string::npos) cout << "illegal email address"; else { auto s1 = email.substr(0, pos); auto s2 = email.substr(pos + 1); cout << s1 << endl; cout << s2 << endl; } string phone{"15216982937"}; cout << phone.replace(3, 5, string(5, '*')) << endl; string s3{"cosmos"}, s4{"galaxy"}; cout << "s3: " + s3 + " s4: " + s4 << endl; s3.swap(s4); cout << "s3: " + s3 + " s4: " + s4 << endl; string s5{"abc"}; const char *pstr = s5.c_str(); cout << pstr << endl; string s6{"12306"}; int x1 = stoi(s6); cout << x1 << endl; int x2 = 12306; string s7 = to_string(x2); cout << s7 << endl; double x3 = 123.06; string s8 = to_string(x3); cout << s8 << endl; }View Code
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实验任务3
task3_1.cpp
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#include <iostream> #include <vector> template<typename T> void output(const T &obj) { for(auto &item: obj) std::cout << item << ", "; std::cout << "\b\b \n"; } int main() { using namespace std; vector<int> v1; vector<int> v2(5); vector<int> v3(5, 42); vector<int> v4{1, 9, 8, 4}; vector<int> v5{v4}; cout << "v2: "; output(v2); cout << "v3: "; output(v3); cout << "v4: "; output(v4); cout << "v5: "; output(v5); }View Code
task3_2.cpp
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#include <iostream> #include <vector> using std::cout; using std::endl; using std::vector; void output(const vector<int> &v) { cout << "v.size() = " << v.size() << endl; cout << "v.capacity() = " << v.capacity() << endl; cout << endl; } int main() { vector<int> v{42}; output(v); v.push_back(55); v.push_back(90); output(v); for(auto i = 0; i < 8; ++i) v.push_back(i); output(v); v.pop_back(); output(v); }View Code
实验任务4
task4.cpp
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#include <iostream> #include <vector> #include <array> #include <string> #include <algorithm> using namespace std; template<typename T> void output1(const T &obj) { for(auto i = 0; i < obj.size(); ++i) cout << obj.at(i) << ", "; cout << "\b\b \n"; } template<typename T> void output2(const T &obj) { for(auto p = obj.cbegin(); p != obj.cend(); ++p) cout << *p << ", "; cout << "\b\b \n"; } template<typename T> void output3(const T &obj) { for(auto &item: obj) cout << item << ", "; cout << "\b\b \n"; } void test1() { string s1{"cplus"}; output1(s1); reverse(s1.begin(), s1.end()); output2(s1); sort(s1.begin(), s1.end()); output3(s1); } void test2() { array< array<int, 4>, 3> x{1, 9, 8, 4, 2, 0, 2, 3, 2, 0, 4, 9 }; output1( x.at(0) ); output2( x.at(1) ); output3( x.at(2) ); } void test3() { vector<string> v1 {"Sheldon", "Leonard", "Howard", "Raj"}; v1.push_back("Penny"); v1.push_back("Amy"); output1(v1); sort(v1.begin(), v1.end(), std::greater<string>()); output2(v1); reverse(v1.begin(), v1.end()); output3(v1); } int main() { cout << "测试1: " << endl; test1(); cout << "测试2: " << endl; test2(); cout << "测试3: " << endl; test3(); }View Code
实验任务5
task5.cpp
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#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(); cout << "加密后英文文本:\t" << encoded_text << endl; decoded_text = TextCoder(encoded_text).get_deciphertext(); cout << "解密后英文文本:\t" << decoded_text << endl; cout << "\n输入英文文本: "; } } int main() { test(); }View Code
textcoder.hpp
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#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) { i=i+7; } } void TextCoder::decoder() { for (auto &i : text) { i=i-7; } } string TextCoder::get_ciphertext() { encoder(); return text; } string TextCoder::get_deciphertext() { decoder(); return text; }View Code
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实验任务6
task6.cpp
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#include "Info.hpp" #include<iostream> #include<string> #include <vector> using namespace std; int main() { const int capacity=100; vector<Info> audience_info_list; cout << "录入信息:" << endl; cout << endl; cout << "昵称 联系方式(邮箱/手机号) 所在城市 预定参加人数 " << endl; char choice; int sum=0; string name, contact, city; int n; while(cin >> name >> contact >> city >> n) { sum+=n; if(sum > capacity) { sum-=n; cout << "对不起,只剩" << capacity-sum << "个位置" << endl; cout << "1.输入u,更新(update)预定信息" << endl << "2.输入q, 退出预定" << endl <<"你的选择: "; cin >> choice; if(choice=='u') { cin >> name >> contact >> city >> n; Info a(name,contact,city,n); audience_info_list.push_back(a); sum+=n; } else break; } else audience_info_list.push_back(Info(name, contact, city, n)); } cout << "截至目前,一共有" << sum << "位听众预定参加。预定听众信息如下:" << endl; for(auto &Info:audience_info_list) { Info.print(); } }View Code
Info.hpp
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#pragma once #include<iostream> #include<string> #include <iomanip> using namespace std; class Info{ public: Info(string nickname0, string contact0, string city0, int n0); ~Info()=default; void print() const; private: string nickname,contact,city; int n; }; Info::Info(string nickname0, string contact0, string city0, int n0) { nickname = nickname0; contact = contact0; city = city0; n=n0; } void Info::print() const { cout << "昵称: " << nickname << endl; cout << "联系方式: " << contact << endl; cout << "所在城市: " << city << endl; cout << "预定参加人数: " << n << endl; }View Code
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标签:std,string,void,C++,实验,using,include,模板,cout From: https://www.cnblogs.com/NFurioso/p/17868073.html