typedef and pointer deletion issues

[doumalc++]

Is there any particular issue between typedef and pointers?

the code below crashes:

#include <iostream>
using namespace std;

typedef unsigned short int uShort;

int main()
{
	uShort a = 45;
	uShort * ipa = new uShort;
	ipa = &a;
	*ipa = 100;
	uShort newData = *ipa;
	cout<<newData <<endl;

	delete ipa;
	ipa = 0;

}

while the code below works fine:

#include <iostream>
using namespace std;

int main()
{
	int a = 45;
	int * ipa = new int;
	ipa = &a;
	*ipa = 100;
	int newData = *ipa;
	cout<<newData <<endl;

	delete ipa;
	ipa = 0;
}