Help with some c++ runtime errors

#include "stdafx.h"
#include <iostream>
#include <sstream>
#include <string>
#include <new>
using namespace std;



int* makelist (int a)
{
     cout << "Initializing memory for operation, please wait... \n";
     int * lenghth;
     lenghth = new (nothrow) int [a];
     if (lenghth == 0)
     {
          cout << "ERROR ALLOCATING MEMORY!\n";
          return 0;
     }
     cout << "Done!\n";
     return(lenghth);
}



void clearmem (int * addy, int lenghth)
{
     cout << "Freeing memory please wait...\n";
     delete[lenghth] addy;
     cout << "Done!";
}



void pause()
{
     cin.ignore();
     cin.get();
}



int main()
{
	int a;
	int a_const;
	int * list_location;
	cout << "Enter the number of numbers you want to find in the Fibonaci sequence.\n";
	cin >> a;
	a_const = a;
	if (a == 0)
	{
		cout << "Ummmm so you started this program to not use it.... im not going\nto calculate the 0th number -.-\npress enter to close...";
		pause();
		return 0;
	}
	list_location = makelist (a);
	clearmem(list_location, a_const);
	pause();
	return 0;
}

// rememb-o-matic
#include <iostream>
#include <new>
using namespace std;

int main ()
{
  int i,n;
  int * p;
  cout << "How many numbers would you like to type? ";
  cin >> i;
  p= new (nothrow) int[i];
  if (p == 0)
    cout << "Error: memory could not be allocated";
  else
  {
    for (n=0; n<i; n++)
    {
      cout << "Enter number: ";
      cin >> p[n];
    }
    cout << "You have entered: ";
    for (n=0; n<i; n++)
      cout << p[n] << ", ";
    delete[] p;
  }
  return 0;
}