pointer of array of class

[harleen]

hello!
i have problem with program i made:
the program should define a pointer to pointer which points to dynamic array of Grade (class i made).
i increase the size of the array in function. so i made a new pointer to pointer which point to array of Grade (the class i made). i transferred the old array to new one, and finaly, before i going out of the function, i shoud transfer it’s address to the first pointer i made:

<hr class="bbcode_rule" /> {<br /> int students=1;<br />  <br />  Grade ** numGrades=new Grade * [students];<br />  numGrades[0]=new Grade;<br />  assert(numGrades!=0);<br />  AddGrade(numGrades,students); <br /> }<br /> void AddGrade(Grade ** _numGrades,int&#038; _students)<br /> {<br />  _students++;<br />  Grade ** gradeTemp=new Grade * [_students];<br />  for(int i=0;i<_students-1;i++)<br />   gradeTemp=_numGrades;<br />  gradeTemp=new Grade;<br /> } <hr class="bbcode_rule" />

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<hr class="bbcode_rule" /> {<br /> int students=1;<br />  <br />  Grade ** numGrades=new Grade * [students];<br />  numGrades[0]=new Grade;<br />  assert(numGrades!=0);<br />  AddGrade(numGrades,students); <br /> }<br /> void AddGrade(Grade ** _numGrades,int&#038; _students)<br /> {<br />  _students++;<br />  Grade ** gradeTemp=new Grade * [_students];<br />  for(int i=0;i<_students-1;i++)<br />   gradeTemp=_numGrades;<br />  gradeTemp=new Grade;<br /> } <hr class="bbcode_rule" />

how can i transfer the address of “gradeTemp” to “numGrades”?
thank you,
Moshiko

[Humayan]

You want to return the newly copied array from the function “AddGrade” ?  If so change your parameters to :
 

void AddGrade ( Grade **&amp;  _numGrades , int &amp;  _students )<br /> {<br />    Grade ** gradeTemp = new Grade * [ _students + 1 ];<br />  <br />    for( int i = 0 ; i &lt; _students + 1 ; i ++ )<br />        gradeTemp [ i ] = _numGrades [ i ] ;<br />    _students ++;<br />   //add code here to delete old "_numGrades" <br />   _numGrades = gradeTemp;<br /> }

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void AddGrade ( Grade **&amp;  _numGrades , int &amp;  _students )<br /> {<br />    Grade ** gradeTemp = new Grade * [ _students + 1 ];<br />  <br />    for( int i = 0 ; i &lt; _students + 1 ; i ++ )<br />        gradeTemp [ i ] = _numGrades [ i ] ;<br />    _students ++;<br />   //add code here to delete old "_numGrades" <br />   _numGrades = gradeTemp;<br /> }

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