TRACE system function call in c++
<p>how call TRACE in c++?please explain
 for example with this simple code</p>

<pre><code>int x = 1;
int y = 16;
float z = 32.0;
TRACE( "This is a TRACE statement\n" );

TRACE( "The value of x is %d\n", x );

TRACE( "x = %d and y = %d\n", x, y );

TRACE( "x = %d and y = %x and z = %f\n", x, y, z );
</code></pre>
