c++ - pointers to a multidimensional array in classes -

i'm trying bottom of error, wonder if please? i'm having bit of issue array pointers @ moment. have 3 classes, 1 parent, , 2 children speak. 1 of children has 2d array of type struct, , i'm trying access elements of other child.

i wondering, code valid correct format/syntax array pointers? ochild1 creates , fills out 2d array, i'm saving pointer in parent, , passing pointer ochild2, , plan on using contents of array further processing.

struct boardtile {     float fposx;     float fposy;      boardtiles()     {         fposx = 0.0f;         fposy = 0.0f;     } };  class cchild1 {     public:         boardtile boardtilearray[18][18];      cchild1()     {     }      writeboardtilearray()     {         (int = 0; <= 17; i++)         {             (int j = 0; j <= 17; j++)             {                 boardtilearray[i][j].fposx = (float) * 5.0f;                 boardtilearray[i][j].fposy = (float) j * 7.0f;             }         }     } };  class cchild2 {     public:         boardtile (*pboardtilearray)[18][18];         float fposx;         float fposy;      cchild2()     {     }      void readboardtilearray()     {         (int = 0; <= 17; i++)         {             (int j = 0; j <= 17; j++)             {                 fposx = (*pboardtilearray[i][j]).fposx;                 fposy = (*pboardtilearray[i][j]).fposy;                 cout << fposx;                 cout << fposy;             }         }     }  };  class cparent {     public:         boardtile (*pboardtilearray)[18][18];         cchild1 ochild1;         cchild2 ochild2;      cparent()     {         ochild1.writeboardtilearray();         pboardtilearray = &(ochild1.boardtilearray);         ochild2.pboardtilearray = pboardtilearray;     } }; 

to store address of 2 dimensional array, need pointer pointer,

without typedef:
declare member pointer as:

boardtile (*pboardtilearray)[18]; 

and in constructor, write:

    pboardtilearray = ochild1.boardtilearray; 

but can see makes code complex. using typedef can simplify it:

with typedef: (recommended way)
typedef can write following in global scope:

typedef boardtile boardtile_ar18_t[18]; 

and can declare member pointer as:

boardtile_ar18_t* pboardtilearray;