struct ObsSet //测量次数 
{ 
 int Count; /// <一测回所测点数 
 double *ets; 

 ~ObsSet() {if(ets!=NULL) delete []ets;} 

 //ObsSet():Count(0){ets=NULL;} 
 ObsSet(int count):Count(count) 
 { 
    ets=new double [Count]; //包括上半测回和下半测回 
 } 

}; 

//再定义一个： 
struct ObsStation /// <测站 
{ 
    CString Name; /// <测站名 -- 不能为空白 
    double Height; /// <测站高， 对于自由设置而言，为0 
    double X,Y,Z; /// <测站三维坐标，对自由设站而言均为0 

    int CountOfTarget; /// <测点数 
    int CountOfObsSet; /// <测回数Observation set 

    ObsSet *ets; 
    ObsStation(int ct,int co):CountOfTarget(ct),CountOfObsSet(co) 
    { 
        char* p = new char[sizeof(ObsSet)*CountOfObsSet]; ///问题就在这里 
        for( int i=0; i < CountOfObsSet ; i ++ ){
            new( p+ i*sizeof(ObsSet) )ObsSet(CountOfObsSet);
        }
        ets = (ObsSet *)p;
    } 
}; 

int main()
{
    ObsStation xx(10,30);
    return 0;
}

struct ObsSet //测量次数 
{ 
    int Count; /// <一测回所测点数 
    double *ets; 

    ~ObsSet() {if(ets!=NULL) delete []ets;} 

    //ObsSet():Count(0){ets=NULL;} 
    ObsSet(int count):Count(count),ets(new double[count])
    { 
        //ets=new double [Count]; //包括上半测回和下半测回 
    } 

}; 

//再定义一个： 
struct ObsStation /// <测站 
{ 
    std::string Name; /// <测站名 -- 不能为空白 
    double Height; /// <测站高， 对于自由设置而言，为0 
    double X,Y,Z; /// <测站三维坐标，对自由设站而言均为0 

    int CountOfTarget; /// <测点数 
    int CountOfObsSet; /// <测回数Observation set 

    ObsSet *ets; 
    ObsStation(int ct,int co):CountOfTarget(ct),CountOfObsSet(co) ,ets(0)
    { 
        char* p = new char[sizeof(ObsSet)*CountOfObsSet]; ///问题就在这里 
        for( int i=0; i < CountOfObsSet ; i ++ ){
            new( p+ i*sizeof(ObsSet) )ObsSet(CountOfObsSet);
        }
        ets = (ObsSet *)p;
    } 
    ~ObsStation()
    {
        for( int i=0; i < CountOfObsSet ; i ++ ){
            //ObsSet* p = ( p+ i*sizeof(ObsSet) );
            ets[i].~ObsSet();
        }
        delete (char*)ets;
    }
}; 

int main(int argc, char* argv[])
{
    ObsStation xx(10,2);
    return 0;
}