一

include

using namespace std;

class rectangle{

public:

void shape(int a=0,int b=0);

void area();

private:

int length,wide;

}

//长方形类成员函数的具体实现

void rectangle::shape(int a,int b){

length=a;

wide=b;

}

inline void rectangle::area(){

cout<<"area="<<endl;

cout<<"length*wide"<<endl;

}

int main(){

int c,d;

rectangle myrectangle;

cout<<"Please input two number"<<endl;

cin>>c;

cin>>d;

myrectangle.shape(c,d);

myrectangle.area();

returen 0;

}

二

include

using namespace std;

class()

{

public:

Complex(float r1,float i1){

real+=r1;

imaginary=0;

}

void add(Complex &c)

{

real+=c.real;

imaginary+=c.imaginary;

}

void show()

{

cout<<real<<(imaginary>0?'+':'-')<<imaginary<<"i"<<endl;

}

private:

float real;

float imaginary;

};

int main()

{

Complex c1(3,5);

Complex c2=4.5;

c2.add(c1);

c2.show();

return 0;

}