#include<iostream> #include<cmath> using namespace std; class Complex { public: Complex(double a=0,double b=0):real{a},imag{b}{}; Complex(const Complex&c1); ~Complex()=default; double get_real()const {return real;} double get_imag()const {return imag;} void show()const; void add(Complex const &c1); friend Complex add(Complex const&c1,Complex const&c2); friend bool is_equal(Complex const&c1,Complex const&c2); friend double abs(Complex const&c1); private: double real; double imag; }; Complex::Complex(const Complex &c1) { real=c1.real; imag=c1.imag; } void Complex::show()const { if(imag==0) cout<<real; else if(imag<0) cout<<real<<"-"<<abs(imag)<<"i"; else cout<<real<<"+"<<imag<<"i"; } void Complex::add(Complex const&c1) { real+=c1.real; imag+=c1.imag; } Complex add(Complex const&c1,Complex const&c2) { Complex c3; c3.real=c1.real+c2.real; c3.imag=c1.imag+c2.imag; return c3; } bool is_equal(Complex const&c1,Complex const&c2) { if(c1.real==c2.real&&c1.imag==c2.imag) return true; return false; } double abs(Complex const&c1) { return sqrt(c1.real*c1.real+c1.imag*c1.imag); }
#include<iostream> #include<string> using namespace std; class User { public: User(string name,string passwd="111111",string email=""):n{name},p{passwd},e{email}{count++;} ~User()=default; void set_email(); void change_passwd(); void print_info(); static void print_n(); private: string n,p,e; static int count; }; int User::count=0; void User::set_email() { cout<<"Enter email adresss:"; cin>>e; cout<<"email s set successfully..."<<endl; } void User::change_passwd() { cout<<"Enter old password:"; string temp; int i=3; while(i) { cin>>temp; if(temp==p) { cout<<"new passwd is set successfully..."<<endl; break; } else { i--; if(i!=0) cout<<"password input error.Please re-enter again:"; } if(i==0) { cout<<"password input error.Please try after a while."<<endl; } } } void User::print_info() { cout<<"name:"<<n<<endl; cout<<"passwd:"<<"******"<<endl; cout<<"email:"<<e<<endl; } void User::print_n() { cout<<"there are"<<count<<"users."<<endl; }
标签:const,对象,double,void,Complex,实验,c1,imag From: https://www.cnblogs.com/djy769855989/p/16785536.html