设计、定义并实现Complex类

设计、定义并实现Complex类

 #include <iostream>
 #include <cmath>
 using namespace std;
 class MyComplex
 {
     public:
         MyComplex(double aa=,double bb=);
         MyComplex(MyComplex &pp);
         void add(MyComplex tt);
         void show();
         double qumo();
     private:
         double reality;
         double imaginary;
 };
 MyComplex::MyComplex(double aa,double bb)
 {
     reality=aa;
     imaginary=bb;
 }
 MyComplex::MyComplex(MyComplex &pp)
 {
     reality=pp.reality;
     imaginary=pp.imaginary;
 }
 void MyComplex::add(MyComplex tt)
 {
     reality+=tt.reality;
     imaginary+=tt.imaginary;
 }
 void MyComplex::show()
 {
     cout<<reality<<"+"<<imaginary<<"i"<<endl;
 }
 double MyComplex::qumo()
 {
     double mo;
     mo=sqrt(reality*reality+imaginary*imaginary);
     return mo;
 }
 int main ()
 {
     double result;
     MyComplex c1(,);
     MyComplex c2(4.5);
     MyComplex c3(c1);
     c1.add(c2);
     c1.show();
     result=c3.qumo();
     cout<<result<<endl;
     return ;
 }

输出结果为复数c1和c2的和，以及c3的模数。

由于这个类里的加法函数和常规习惯有出入，所以修改为下面的重载函数形式：

 #include <iostream>
 #include <cmath>
 using namespace std;
 class MyComplex
 {
     public:
         MyComplex(double aa=,double bb=);
         MyComplex(MyComplex &pp);
         void add(MyComplex tt,MyComplex rr);
         void add(MyComplex tt);
         void show();
         double qumo();
     private:
         double reality;
         double imaginary;
 };
 MyComplex::MyComplex(double aa,double bb)
 {
     reality=aa;
     imaginary=bb;
 }
 MyComplex::MyComplex(MyComplex &pp)
 {
     reality=pp.reality;
     imaginary=pp.imaginary;
 }
 void MyComplex::add(MyComplex tt,MyComplex rr)
 {
     reality=tt.reality+rr.reality;
     imaginary=tt.imaginary+rr.imaginary;
 }
 void MyComplex::add(MyComplex tt)
 {
     reality+=tt.reality;
     imaginary+=tt.imaginary;
 }
 void MyComplex::show()
 {
     cout<<reality<<"+"<<imaginary<<"i"<<endl;
 }
 double MyComplex::qumo()
 {
     double mo;
     mo=sqrt(reality*reality+imaginary*imaginary);
     return mo;
 }
 int main ()
 {
     double result;
     MyComplex c1(,);
     MyComplex c2(4.5);
     MyComplex c3(c1);
     MyComplex c4;
     c4.add(c1,c2);
     c1.add(c2);
     c4.show();
     c1.show();
     result=c3.qumo();
     cout<<result<<endl;
     return ;
 }

一种是把结果保存在加数c1中，另一种是保存在另一个复数对象c4中。

实验总结：

（1）当要求的操作方式可以改进时可以尝试进行改进。

（2）成员函数的形参个数 是否需要默认形参值 是否需要返回值 返回值类型 都需要结合函数的作用适当选择。