结构体指针

[kejie1235]

typedef struct AREA
{
	int a;
	int b;
	/*AREA()
	{
		area *p = (area *)malloc(sizeof(area) );
	}*/
}area;

typedef struct NODE
{
	area *no;
	struct NODE *pre;
	struct NODE *nxt;	
	NODE()
	{
		no = (area *)malloc(sizeof(area) );
	}
	~NODE()
	{
		free(no);
	}
}node;

#include <iostream>
#include "main.h"
using namespace std;

int main()
{
	node *link;
	link = (node *)malloc(sizeof(node ) );
	link->nxt = NULL;
	link->pre = NULL;
	//link->no = (area *)malloc(sizeof(area) );
	link->no->a = 8;
	link->no->b  = 9;

	cout<<link->no->a<<" "<<link->no->b<<endl;
	return 1;
}

这个会报错

typedef struct AREA
{
	int a;
	int b;
	AREA()
	{
	       area *p = (area *)malloc(sizeof(area) );
	}
}area;

typedef struct NODE
{
	area *no;
	struct NODE *pre;
	struct NODE *nxt;	
	/*NODE()
	{
		no = (area *)malloc(sizeof(area) );
	}
	~NODE()
	{
		free(no);
	}*/
}node;

#include <iostream>
#include "main.h"
using namespace std;

int main()
{
	node *link;
	link = (node *)malloc(sizeof(node ) );
	link->nxt = NULL;
	link->pre = NULL;
	//link->no = (area *)malloc(sizeof(area) );
	link->no->a = 8;
	link->no->b  = 9;

	cout<<link->no->a<<" "<<link->no->b<<endl;
	return 1;
}

这个成功了 求解释

[老邓]

typedef struct AREA
{
    int a;
    int b;
    AREA()
    {
           AREA *p = (AREA *)malloc(sizeof(AREA) );
    }
}area;

[a_mu_lol]

int main() { node *link; //link = (node *)malloc(sizeof(node ) ); link=new node; link->nxt = NULL; link->pre = NULL; //link->no = (area *)malloc(sizeof(area) ); (link->no)->a = 8; (link->no)->b = 9; if (link->no!=NULL) { cout<<(int*)(link->no)<<endl; } cout<<link->no->a<<" "<<link->no->b<<endl; return 0; }

[a_mu_lol]

我试了你的两个都没成功

[wintree]

看了好蛋痛的编程。。c语言不c语言，c++不是C++的。

[kejie1235]

我在vs2010上试了上述两个程序，下面一个程序通过了。可我觉得应该第一个程序是对的。在NODE结构体里写个构造函数 来初始化他的成员指针area *are

[kejie1235]

版主 发表下意见啥。