/ define a new real number formatting policy</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Num</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">scientific_policy</span> <span class="special">:</span> <span class="identifier">real_policies</span><span class="special">&lt;</span><span class="identifier">Num</span><span class="special">&gt;</span>
<span class="speci