/* -----------------------------------------------
**  Self-test exercise 7: Trace execution.
*/
#include <stdio.h>

int y = 2, z = 3;          /* Global variables! */

int func1( int* x, int* y );
void func2( int* x ) { *x = y;  y = z;  z = *x; }

void main( void )
{
    int x = func1( &y, &x );
    printf( "X = %i  Y = %i  Z = %i\n", x, y, z );
}
 
int func1( int* x, int* y )
{
    *y = z + 1;
    *x = *y;
    func2( y );
    z = *x + 2;
    return *y;
}