Passing Pointers to function example

// This program is not intended to work correctly.  It is used
// demonstrate a common pitfall.  See article for more details.

#include <stdio.h>

void AddFive(int Number)
{
	Number = Number + 5;
}

void main()
{
	int nMyNumber = 18;
	
	printf("My original number is %d\n", nMyNumber);
	AddFive(nMyNumber);
	printf("My new number is %d\n", nMyNumber);
}

#include <stdio.h>
void AddFive(int *Number)
{
	*Number = *Number + 5;
}

void main()
{
	int nMyNumber = 18;
	
	printf("My original number is %d\n", nMyNumber);
	AddFive(&nMyNumber);
	printf("My new number is %d\n", nMyNumber);
}