Using array of pointers to object in C++ -

i need save objects pointers in dynamic array have problem. code, there 3 classes , need have array (arrayoftwo) of poiters class 2 work further class 3 , on. have 2 problems. 1 cant figure out how dynamically allocate space arrayoftwo (which need dynamically resize number of stored pointers) , second problem how store pointers objects without destroying object itself. here code:

#include <cstdio> #include <cstdlib> #include <cstring> #include <iostream> using namespace std;  class 1 { public:     bool addtwo(int a);  private:     void getspace(void);     class 2 {     public:         int a;     private:          class 3 {             /*...*/         };         3 arrayofthree[];      };     int freeindex;     int allocated;     2 *arrayoftwo[]; };  void one::getspace(void){     // how allocate space array of pointers ?     arrayoftwo=new *two[100];     allocated=100; } bool one::addtwo(int a){     2 temp;     temp.a=a;     getspace();     arrayoftwo[freeindex]=&temp;     freeindex++;     return true;     //after leaving method, object temp still exist or pointer stored in array pointing on nothing ? }  int main() {     bool status;     1 x;     status = x . addtwo(100);     return 0; } 

thank help.

edit: cant use vector or other advanced containers

temp not exist after leaving addtwo; pointer store invalid @ point. instead of storing object local variable, allocate on heap new:

  two* temp = new two(); 

to allocate array of pointers:

  two** arrayoftwo;  // declare   // ...   arrayoftwo = new two*[100]; 

and getspace should either passed a (from addtwo) or a should stored member variable allocated , getspace should access there. otherwise it's assuming 100.