c++求圆柱体表面积定义基类location,包含私有成员：x,y,公有成员函数：构造和析构函数,求面积函数area()

#include
#include
class location
{
private:
float x;
float y;
float a;
public:
location() {x=0;y=0;}
location(float a,float b) {x=a;y=b;}
~location() {}
float get_x() {return x;}
float get_y() {return y;}
void set_x() {coutx;}
void set_y() {couty;}
float area() {return a=3.14*x*x*y;}
void disp() {cout