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。