在不同环境下，没有被初始化的对象成员的值是多少
#include <iostream>
using namespace std;
class A{
public:
int a;
float b;
double c;
long d;
short e;
void show()
{
cout<<"protected:int float double long short:"<<'\n'<<x<<'\n'<<y<<'\n'<<z<<'\n'<<g<<'\n'<<h<<endl;
cout<<"public:int float double long short:"<<'\n'<<a<<'\n'<<b<<'\n'<<c<<'\n'<<d<<'\n'<<e<<endl;
cout<<"private:int float double long short:"<<'\n'<<A<<'\n'<<B<<'\n'<<C<<'\n'<<D<<'\n'<<E<<endl;
}
private:
int A;
float B;
double C;
long D;
short E;
protected:
int x;
float y;
double z;
long g;
short h;
};
int main(int argc, char *argv[])
{
A *z=new A();
z->show();
cout<<"_________________________"<<endl;
A Z;
Z.show();
return 0;
}
结果1:
protected:int float double long short:
0
0
0
0
0
public:int float double long short:
0
0
0
0
0
private:int float double long short:
0
0
0
0
0
_________________________
protected:int float double long short:
0
5.88247e-39
2.07346e-317
140736512553072 X
0
public:int float double long short:
1619825064 X
4.57986e-41 X
2.12203e-314
140736512552784 X
2869
private:int float double long short:
0
2.8026e-45
2.07406e-317
1
0
发现new方法创建的对象成员初值均为0，另外结果有X的是随着多次编译而发生改变的值
另外我发现，如果屏蔽掉protected的成员那么public成员的值又是不同的规律，屏蔽了以下代码后的结果看结果2。
cout<<"protected:int float double long short:"<<'\n'<<x<<'\n'<<y<<'\n'<<z<<'\n'<<g<<'\n'<<h<<endl;
protected:
int x;
float y;
double z;
long g;
short h;
public:int float double long short:
0
0
0
0
0
private:int float double long short:
0
0
0
0
0
_________________________
public:int float double long short:
2
0
2.07395e-317
1
0
private:int float double long short:
0
5.88216e-39
2.07346e-317
140734589622736 X
0
对于这样的结果很是不解