析构函数

#include <iostream.h>
class eaxm
{private:
 char *str;//
public:
 exam();//这是构造函数
 ~exam();
 void show();
};
exam::exam()
{
 str=new char[10];//分配内存空间
str[0]='d';
str[1]='d';
str[2]='\0';
}
 void exam::show()
{cout<<str<<endl;
}
exam::~exam()
{
 cout<<"我是析构函数"<<endl;
delete[] str;}
int main()
{
 exam s1;
s1.show();
cout<<"退出"<<endl;
return 0;
}