标题: 一个C++程序的问题 [打印本页]

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作者: 张哲上     时间: 2007-10-2 10:20    标题: 一个C++程序的问题

大家好：
      有谁能帮帮我，我现在有个问题总是百思不解，望详细解答一下，谢谢了!
第一个程序：
#include<iostream>
using namespace std;

int main()
{
        int *p1,*p2;
        p1 = new int;
        *p1 = 42;
        p2 = p1;
        cout << "*p1 == " << *p1 << endl;
        cout << "*p2 == " << *p2 << endl;
        *p2 = 53;
        cout << " *p1 == " << *p1 << endl;
        cout << "*p2 == " << *p2 <<endl;
        delete p1;
        p1 = new int;
        *p1 = 88;
        cout << "*p1 == " << *p1 << endl;
        cout << "*p2 == " << *p2 << endl;
        cout << "Hope you got the point of this example!\n";
        return 0;
}
第二个程序：
#include<iostream>
using namespace std;

int main()
{
        int *p1,*p2;
        p1 = new int;
        *p1 = 42;
        p2 = p1;
        cout << "*p1 == " << *p1 << endl;
        cout << "*p2 == " << *p2 << endl;
        *p2 = 53;
        cout << " *p1 == " << *p1 << endl;
        cout << "*p2 == " << *p2 <<endl;

        p1 = new int;
        *p1 = 88;
        cout << "*p1 == " << *p1 << endl;
        cout << "*p2 == " << *p2 << endl;
        cout << "Hope you got the point of this example!\n";
        return 0;
}

为什么第一个程序比第二个程序多了一个 delete p1 后结果会不同呢？

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作者: leelee     时间: 2007-10-2 16:40
楼主的vc6有没有打过补丁

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作者: qq2008444     时间: 2007-10-2 17:08
呵呵
没办法帮忙
道歉先

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