#include <iostream>using namespace std;class A{public:	A(){cout<<"执行构造函数创建一个对象\n";}	~A(){cout<<"执行构析构函数\n";}	void set(int width= 10,int height =6);private:	int w;	int h;};void A::set(int width, int height){	w=width;	h=height;	cout<<"h="<<h<<endl<<"w="<<w<<endl;	cout<<"S=h*w="<<h*w<<endl;}void func(int a=5, int b=4)	{		cout<<"a="<<a<<endl<<"b="<<b<<endl;}int main(){	A a;	a.set();	func();	return 0;}/*****************************************************执行构造函数创建一个对象h=6w=10S=h*w=60a=5b=4执行构析构函数******************************************************/