/* Fig. 7.12: fig07_12.c
	Attempting to modify data through a
	non-constant pointer to constant data. */
	#include <stdio.h>
	void f( const int *xPtr );
	int main( void )
	{
	int y;
	f( &y );
	return 0;
	}
	void f( const int *xPtr )
	{
	*xPtr = 100;
	}