关于链表的问题(接上次)
typedef struct node{
int id;
int type;
CArray <CMyPoint,CMyPoint> m_point;
struct node*next;
}NODE,*PNODE;
class CMyPoint{
public:
double x;
double y;
};
CStdioFile f("F:\\1.txt",CFile::modeRead);
CString buf;
CMyPoint p;
//PNODE n=(PNODE)malloc(sizeof(node));
PNODE n=new node;//建立带头结点的单链表.
n->next=NULL;
while(buf!="-999999,-999999"){ //将数据读入结构体.
//PNODE q=(PNODE)malloc(sizeof(node));
PNODE q=new node;
f.ReadString(buf);
if(buf=="-999999,-999999")
break;
q->id=atoi(buf.Left(buf.Find(",")));
f.ReadString(buf);
q->type=atoi(buf.Left(buf.Find(",")));
while(buf!="-666666.0,-666666.0"){
f.ReadString(buf);
if(buf=="-666666.0,-666666.0")
break;
p.x=atof(buf.Left(buf.Find(",")));
p.y=atof(buf.Right(buf.Find(",")-1));
q->m_point.Add(p);
}
q->next=n->next;
n->next=q;
}
double a1,b1,c1,a2,b2,c2;//仿射变换系数.
a1=0.0908842393810368;
b1=0;
c1=29.0515464310376;
a2=0.000007;
b2=-0.1808361;
c2=-2.256299;
CMyPoint pt; //用来存放变换后的点
int j;
n->next=n->next->next;//指针下移一位,跳过头结点.
while(n->next!=NULL)
{
for(j=0;j<n->next->m_point.GetSize();j++)//在这个地方就出了问题调试发现.Getsize()值为0.
{
pt=n->m_point.GetAt(j); //获取第i个实体结点.
pt.x=a1*(pt.x)+b1*(pt.y)+c1;
pt.y=a2*(pt.x)+b2*(pt.y)+c2;
n->m_point.SetAt(j,pt); //将转换后的结点存入原位置.
}
n=n->next;
}
现在疑问是,在调试读取数据进结构体时,没有任何问题,可是在对已经读入了数据的结构体进行仿射变换时,先前查看n->next的地址是:0xcdcdcdcd,在进行仿射变换的时候n->next是:0x0082c8,怎么回事?是引用错误了吗?