第二周测验 004:哪来的输出

<dl class="problem&#45;params" style="color&#58;rgb&#40;35&#44;31&#44;23&#41;&#59;font&#45;family&#58;&#39;Lucida Grande&#39;&#44; Verdana&#44; &#39;Bitstream Vera Sans&#39;&#44; Arial&#44; sans&#45;serif&#59;font&#45;size&#58;14px&#59;"> <dt> 总时间限制:  </dt> <dd style="margin&#45;left&#58;0px&#59;"> 1000ms </dd> <dt> 内存限制:  </dt> <dd style="margin&#45;left&#58;0px&#59;"> 65536kB </dd> </dl> <dl class="problem&#45;content" style="color&#58;rgb&#40;35&#44;31&#44;23&#41;&#59;font&#45;family&#58;&#39;Lucida Grande&#39;&#44; Verdana&#44; &#39;Bitstream Vera Sans&#39;&#44; Arial&#44; sans&#45;serif&#59;font&#45;size&#58;14px&#59;"> <dt style="font&#45;size&#58;16px&#59;line&#45;height&#58;56px&#59;"> 描述 </dt> <dd style="margin&#45;left&#58;0px&#59;">

程序填空，输出指定结果 

</dd> <dd style="margin&#45;left&#58;0px&#59;">

#include <iostream>
using namespace std;
class A {
	public:
		int i;
		A(int x) { i = x; }

</dd> </dl>

// 在此处补充你的代码

};
int main()
{
	A a(1);
	A * pa = new A(2);
	delete pa;
	return 0;
}

输入无输出2
1样例输入

无

2样例输出

2

完整代码：（所用知识： 析构函数
#include <iostream>
using namespace std;
class A
{
public:
    int i;
    A(int x)
    {
        i = x;
    }
    ~A()
    {
        cout<<i<<endl;
    }
};
int main()
{
    A a(1);
    A * pa = new A(2);
    delete pa;
    return 0;
}