Searching Array

I am having some problems with this function I am trying to write and could use a little help. I have an array of pointers to base class Person as.......Person* people[count] which is used to create and store objects of 3 derived classes. I am trying to figure out how I can remove all objects of a certain type from the array.
I have been trying something like the following but this does not work.

Code:

 
for(i=0;i<count;i++)	
{
	if(typeid(*people[i])==typeid(Student))
	{
	   for(j=i;j<count-1;j++)
               people[j]=people[j+1];
            count--;
	}
}

Assuming you allocated each person in the people array with new, then your code should work.

But it should also free up memory as stuff is moved.

Code:

for(i=0;i<count;i++)	
{
	if(typeid(*people[i])==typeid(Student))
	{
	   delete people[i];
	   for(j=i;j<count-1;j++)
               people[j]=people[j+1];
            count--;
	}
}

I am allocating with new and I knew that I should be freeing the memory as I remove elements of the array. I tried it with the delete after the if statement and I get an abnormal program termination. MSVC++6.

Code:

switch(p) 
{ 
   case 1:for(i=0;i<count;i++)
   	      if(typeid(*people[i])==typeid(Student))
	      {
		 delete people[i]; 
		 for(j=i;j<=count-1;j++)
		     people[j]=people[j+1];
                 count--;
	      }break; 
   case 2:for(i=0;i<count;i++)	
   	      if(typeid(*people[i])==typeid(Teacher))
	      {
		 delete people[i]; 
		 for(j=i;j<=count-1;j++)
		     people[j]=people[j+1];
                 count--;
	      }break; 
   case 3:for(i=0;i<count;i++)	
   	      if(typeid(*people[i])==typeid(Manger))
	      {
		 delete people[i]; 
		 for(j=i;j<=count-1;j++)
		     people[j]=people[j+1];
                 count--;
	      }break;
}

This is basically what I am trying to do(above). I have gotten it to work to remove one type without using delete. But say after removing all students, I want to go back in and remove all teachers.....that's just not happening for me. I have drawn this out several times and on paper it seems like it should work just fine. Any ideas on what I am doing wrong here?

Does you people allocation look anything like this? I know you are using classes, so the allocation may be in a constructor. I did a simple example which looked like this:

Code:

Person *people[10];
.
.
count = 0;
for (i=0; i<10; i++)
{
   people[count] = new Person;
   people[count]->Id = i;
   count++;
}

I just have menu selection of what type of person to create then pass an integer to a function and allocate like this.

Code:

 
if(n == 1)
   people[count] = new Student; 
else if(n == 2) 
	people[count] = new Teacher; 
     else 
	people[count] = new Manager;
people[count++]->getData();

This isn't in a loop, I am just creating one at a time, and of course getData() is virtual. I got the delete to run now so I am making progress but I still can not get this to do exactly what I want it to do. I just want to be able to fill the array with people...then delete all the students, then delete all the teachers and so on. Right now I can delete all of one type but it won't work when I go back in to delete another type which makes no sense to me. Thanks for the help.