实验1 类与对象
task3
Complex.hpp源码
#include<iostream> #include<cmath> using namespace std; class Complex { public: Complex(float newReal,float newImag); Complex(); Complex(float newReal); Complex(const Complex &p); float get_real()const; float get_imag()const; void show() const; void add(Complex p); friend Complex add(Complex p1,Complex p2); friend bool is_equal(Complex p1,Complex p2); friend float abs(Complex &p); private: float real,imag; }; Complex::Complex(float newReal,float newImag):real(newReal),imag(newImag){} Complex::Complex():real(0),imag(0){} Complex::Complex(float newReal):real(newReal),imag(0){} Complex::Complex(const Complex &p){ real=p.real; imag=p.imag; } float Complex::get_real()const{ return real; } float Complex::get_imag()const{ return imag; } void Complex::show()const{ cout<<real; if(imag<0){ cout<<" - "<<-imag<<"i"; } else if(imag>0){ cout<<"+"<<imag<<"i"; } } void Complex::add(Complex p){ real=real+p.real; imag=imag+p.imag; } Complex add(Complex p1,Complex p2){ Complex c; c.real=p1.real+p2.real; c.imag=p1.imag+p2.imag; return c; } bool is_equal(Complex p1,Complex p2){ if(p1.real==p2.real && p1.imag==p2.imag) return true; else return false; } float abs(Complex &p){ float temp1,temp2; temp1=p.real*p.real+p.imag*p.imag; temp2=sqrt(temp1); return temp2; }
task3.cpp源码
#include "Complex.hpp" #include <iostream> int main() { using namespace std; Complex c1(3, -4); const Complex c2(4.5); Complex c3(c1); cout << "c1 = "; c1.show(); cout << endl; cout << "c2 = "; c2.show(); cout << endl; cout << "c2.imag = " << c2.get_imag() << endl; cout << "c3 = "; c3.show(); cout << endl; cout << "abs(c1) = "; cout << abs(c1) << endl; cout << boolalpha; cout << "c1 == c3 : " << is_equal(c1, c3) << endl; cout << "c1 == c2 : " << is_equal(c1, c2) << endl; Complex c4; c4 = add(c1, c2); cout << "c4 = c1 + c2 = "; c4.show(); cout << endl; c1.add(c2); cout << "c1 += c2, " << "c1 = "; c1.show(); cout << endl; }
task3.cpp对应结果截图
新实验数据源码
#include "Complex.hpp" #include <iostream> int main() { using namespace std; Complex c1(6, -2); const Complex c2(9); Complex c3(c1); cout << "c1 = "; c1.show(); cout << endl; cout << "c2 = "; c2.show(); cout << endl; cout << "c2.imag = " << c2.get_imag() << endl; cout << "c3 = "; c3.show(); cout << endl; cout << "abs(c1) = "; cout << abs(c1) << endl; cout << boolalpha; cout << "c1 == c3 : " << is_equal(c1, c3) << endl; cout << "c1 == c2 : " << is_equal(c1, c2) << endl; Complex c4; c4 = add(c1, c2); cout << "c4 = c1 + c2 = "; c4.show(); cout << endl; c1.add(c2); cout << "c1 += c2, " << "c1 = "; c1.show(); cout << endl; }
新实验数据对应结果截图
task4
User.hpp源码
#include<iostream> #include<string.h> using namespace std; class User{ public: User(string newName); User(string newName ,string newPassWord, string newEmail); void set_email(); void change_passwd(); void print_info(); static void print_n(); private: string name; string passwd; string email; static int count; }; int User::count=0; User::User(string newName):name(newName){ ++count; passwd="111111"; email=""; } User::User(string newName ,string newPassWord, string newEmail):name(newName),passwd(newPassWord),email(newEmail){ ++count; } void User::set_email(){ cout<<"Enter email address:"; cin>>email; cout<<"email is set successfully..."<<endl; } void User::change_passwd(){ int newwd,i; string testwd; cout<<"Enter old password:"; cin>>testwd; for(i=0;i<2;){ if(testwd==passwd){ cout<<"Enter new passwd:"; cin>>newwd; passwd=newwd; cout<<"new passwd is successfully..."<<endl; break; }else{ cout << "password input error.Please re-enter again:"; cin>>testwd; i++; } if(i==2) cout<<"password input error. Please try after a while."<<endl; } } void User::print_info(){ cout<<"name:"<<name<<endl; cout<<"passwd: ******"<<endl; cout<<"email:"<<email<<endl; } void User::print_n(){ if(count==1) cout<<"there is 1 user"; else cout<<"there are " <<count<<" users"; }
task4.cpp源码
#include "User.hpp" #include <iostream> int main() { using namespace std; cout << "testing 1......" << endl; User user1("Jonny", "92197", "xyz@hotmail.com"); user1.print_info(); cout << endl << "testing 2......" << endl << endl; User user2("Leonard"); user2.change_passwd(); user2.set_email(); user2.print_info(); User::print_n(); }
task4.cpp对应结果截图
新实验数据源码
int main() { using namespace std; cout << "testing 1......" << endl; User user1("陈超凡", "020220", "nmsl@hotmail.com"); user1.print_info(); cout << endl << "testing 2......" << endl << endl; User user2("朱辰逸"); user2.change_passwd(); user2.set_email(); user2.print_info();
新实验数据实验结果截图
实验总结:
1.注意const的用法和他对引用&的影响
2.注意接口的定义和实现是否满足对应实验要求