实验任务1
task1_1:
#include <iostream> #include <string> #include <vector> int main() { using namespace std; string s1; string s2{ "c plus plus" }; string s3{ s2 }; string s4 = s2; s1 = "oop"; vector<string> v1; v1.push_back(s1); v1.push_back(s2 + "1"); v1.push_back(s3 + "2"); v1.push_back(s4 + "3"); cout << "output1:" << endl; for (auto item : v1) { cout << item << endl; } cout << "output2:" << endl; for (auto p = v1.begin(); p != v1.end(); ++p) { cout << *p << endl; } cout << "output3:" << endl; for (auto i = 0; i < v1.size(); ++i) { cout << v1[i] << endl; } vector<string> v2{ v1.rbegin(),v1.rend() }; cout << "v2:" << endl; for (auto item : v2) { cout << item << endl; } }
运行结果:
task1_2:
#include <iostream> #include <string> #include <vector> #include <cmath> #include <cstdlib> #include <time.h> template<typename T> void output(const T& obj) { for (auto item : obj) std::cout << item << " "; std::cout << std::endl; } int main() { using namespace std; vector<int> v1{ 1, 9, 8, 4 }; v1.insert(v1.begin(), 2022); v1.insert(v1.end(), 2023); cout << "v1: "; output(v1); v1.pop_back(); v1.erase(v1.begin()); cout << "v1: "; output(v1); vector<string> v2{ "《1984》", "《动物农场》", "《美丽新世界》" }; cout << "v2: "; output(v2); }
运行结果:
实验任务2:
task2:
#include<iostream> using namespace std; class Point{ public: Point(int x0 = 0, int y0 = 0); Point(const Point& p); ~Point() = default; int get_x() const { return x; } int get_y() const { return y; } void show() const; private: int x, y; }; Point::Point(int x0, int y0) :x{ x0 }, y{ y0 }{ cout << "constructor called." << endl; } Point::Point(const Point& p) : x{ p.x }, y{ p.y }{ cout << "copy constructor called." << endl; } void Point::show() const { cout << "(" << x << "," << y << ")" << endl; } int main() { Point p1(4, 5); p1.show(); Point p2 = p1; p2.show(); Point p3{ p2 }; p3.show(); cout << p3.get_x() << endl; }
实验结果:
实验任务3:
task3:
#include <iostream> #include <iomanip> using std::cout; using std::endl; class Clock { public: Clock(int h = 0, int m = 0, int s = 0); Clock(const Clock& t); ~Clock() = default; void set_time(int h, int m = 0, int s = 0); void show_time() const; private: int hour, minute, second; }; Clock::Clock(int h, int m, int s) : hour{ h }, minute{ m }, second{ s } { cout << "constructor called" << endl; } Clock::Clock(const Clock& t) : hour{ t.hour }, minute{ t.minute }, second{ t.second } { cout << "copy constructor called" << endl; } void Clock::set_time(int h, int m, int s) { hour = h; minute = m; second = s; } void Clock::show_time() const { using std::setw; using std::setfill; cout << setfill('0') << setw(2) << hour << ":" << setw(2) << minute << ":" << setw(2) << second << endl; } Clock reset() { return Clock(0, 0, 0); } int main() { Clock c1(12, 0, 5); c1.show_time(); c1 = reset(); c1.show_time(); Clock c2(c1); c2.set_time(6); c2.show_time(); }
实验结果:
实验任务4:
task4:
#include <iostream> // 定义一个简单抽象类 class X{ public: X(); ~X(); X(int m); X(const X& obj); X(X&& obj) noexcept; void show() const; private: int data; }; X::X(): data{42} { std::cout << "default constructor called.\n"; } X::~X() { std::cout << "destructor called.\n"; } X::X(int m): data{m} { std::cout << "constructor called.\n"; } X::X(const X& obj): data{obj.data} { std::cout << "copy constructor called.\n"; } X::X(X&& obj) noexcept: data{obj.data} { std::cout << "move constructor called.\n"; } void X::show() const { std::cout << data << std::endl; } int main() { X x1; x1.show(); X x2{2049}; x2.show(); X x3{x1}; x3.show(); X x4{ std::move(x2) }; x4.show(); }
运行结果:
实验任务5:
task5:
#include <iostream> #include <iomanip> class Rectangle { public: Rectangle(); Rectangle(double l, double w); Rectangle(const Rectangle& rect); ~Rectangle(); double len() const; double wide() const; double area() const; double circumference() const; void resize(double times); void resize(double l_times, double w_times); private: double length, width; }; Rectangle::Rectangle():length{ 2.0 }, width{ 1.0 } {} Rectangle::Rectangle(double l,double w):length{l},width{w}{} Rectangle::Rectangle(const Rectangle& rect) : length{ rect.length }, width{ rect.width }{} Rectangle::~Rectangle(){} double Rectangle::len() const { return length; } double Rectangle::wide() const { return width; } double Rectangle::area() const { return length * width; } double Rectangle::circumference() const { return 2 * (length + width); } void Rectangle::resize(double times) { length *= times; width *= times; } void Rectangle::resize(double l_times, double w_times) { length *= l_times; width *= w_times; } // 普通函数, 用于输出矩形信息 void output(const Rectangle& rect) { using namespace std; cout << "矩形信息: \n"; cout << fixed << setprecision(2); cout << "矩形的长: " << left << setw(6) << rect.len() << endl; cout << "矩形的宽: " << left << setw(6) << rect.wide() << endl; cout << "矩形的面积:" << left << setw(6) << rect.area() << endl; cout << "矩形的周长:" << left << setw(6) << rect.circumference() << endl; cout << endl; } // 主函数,测试Rectangle类 int main() { Rectangle rect1; // 默认构造函数被调用 output(rect1); Rectangle rect2(10, 5); // 带有两个参数的构造函数被调用 output(rect2); Rectangle rect3(rect1); // 复制构造函数被调用 rect3.resize(2); // 矩形rect3的长和宽同时缩放2倍 output(rect3); rect3.resize(5, 2); // 矩形rect3的长缩放5倍, 宽缩放2倍 output(rect3); }
运行结果:
标签:const,int,double,v1,实验,include,Rectangle From: https://www.cnblogs.com/pxy202183290510/p/16738616.html