qq_41199332的博客

int main() { double r=3; double a=5,b=8; circle c(r); rectangle rec(5,8); cout<<"圆的面积为："<<c.getarea()<<endl <<"圆的周长为："<<c.getperimeter()<<endl <<"矩形的周长为："<<rec.getarea()<<endl <<"矩形的面积为："<<rec.getperimeter()<<endl; return 0;