t open input file: 'multi_pass.txt'"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
        <span class="keyword">return</span> <span class="special">-</span><span class="number">1</span><span class="special">;</span>
    <span class="special">}</span>

    <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identif