喜刷刷4 shape類 4（完成RsubC類）

小聰送給小亮和小華的形狀他們都很喜歡,小亮和小華非要比一下他們兩個的形狀，來看看小聰更愛誰

小強寫的檔案頭和shape類

#include

#define pi 3.14

using namespace std;

class shape

;shape::shape()

shape::shape(int c)

int shape::getcolor()

double shape::area()

小聰寫的rectangle類

class rectangle:public shape

;rectangle::rectangle(int c,double w,double h):shape(c)

double rectangle::getwidth()

double rectangle::getheight()

double rectangle::area()

double rectangle::price()

小聰寫的circle類

class circle:public shape;

circle::circle(int c,double r):shape(c)

double circle::getradius()

double circle::area()

double circle::price()

小聰的測試函式：

int main()

#include#define pi 3.14

using namespace std;
class shape
;shape::shape()
shape::shape(int c)
int shape::getcolor()
double shape::area()
class rectangle:public shape
;rectangle::rectangle(int c,double w,double h):shape(c)
double rectangle::getwidth()
double rectangle::getheight()
double rectangle::area()
double rectangle::price()
class circle:public shape
;circle::circle(int c,double r):shape(c)
double circle::getradius()
double circle::area()
double circle::price()
class rsubc:public shape
;rsubc::rsubc(int c,double w,double h,double r,bool s):shape(c),rectangle(c,w,h),circle(c,r),sign(s){}
double rsubc::area()
int main()
{rsubc rc=rsubc(1,2,3,1,1);
cout<
rsubc area:2.86
學習總結：
這幾個shape類的題層層巢狀，循序漸進，很有用。