Convert <spanclass="parameter">op</span> to a <ahref="http://msdn2.microsoft.com/en-us/library/643eft0t"target="_blank">Double</a>, truncating if necessary (i.e. rounding towards zero).
If the exponent in <spanclass="parameter">op</span> is too big or too small to fit a <ahref="http://msdn2.microsoft.com/en-us/library/643eft0t"target="_blank">Double</a> then the result is system dependent.
For too big an infinity is returned when available.
For too small <spanclass="code">0.0</span> is normally returned.
Hardware overflow, underflow and denorm traps may or may not occur.
</p></div><divclass="collapsibleAreaRegion"><spanclass="collapsibleRegionTitle"onclick="SectionExpandCollapse('ID3RB')"onkeypress="SectionExpandCollapse_CheckKey('ID3RB', event)"tabindex="0"><imgid="ID3RBToggle"class="collapseToggle"src="../icons/SectionExpanded.png"/>Examples</span></div><divid="ID3RBSection"class="collapsibleSection"><divclass="codeSnippetContainer"><divclass="codeSnippetContainerTabs"><divid="ID0EDAABA_tab1"class="codeSnippetContainerTab"><ahref="#"onclick="javascript:ChangeTab('ID0EDAABA','cs','1','4');return false;">C#</a></div><divid="ID0EDAABA_tab2"class="codeSnippetContainerTab"><ahref="#"onclick="javascript:ChangeTab('ID0EDAABA','vb','2','4');return false;">VB</a></div><divid="ID0EDAABA_tab3"class="codeSnippetContainerTabPhantom"><ahref="#"onclick="javascript:ChangeTab('ID0EDAABA','cpp','3','4');return false;">C++</a></div><divid="ID0EDAABA_tab4"class="codeSnippetContainerTabPhantom"><ahref="#"onclick="javascript:ChangeTab('ID0EDAABA','fs','4','4');return false;">F#</a></div></div><divclass="codeSnippetContainerCodeContainer"><divclass="codeSnippetToolBar"><divclass="codeSnippetToolBarText"><aid="ID0EDAABA_copyCode"href="#"class="copyCodeSnippet"onclick="javascript:CopyToClipboard('ID0EDAABA');return false;"title="Copy">Copy</a></div></div><divid="ID0EDAABA_code_Div1"class="codeSnippetContainerCode"style="display: block"><prexml:space="preserve"><spanclass="highlight-comment">// Set default precision to 64 bits.</span>
<spanclass="highlight-comment">// Release unmanaged memory allocated for x.</span>
gmp_lib.mpf_clear(x);</pre></div><divid="ID0EDAABA_code_Div2"class="codeSnippetContainerCode"style="display: none"><prexml:space="preserve"><spanclass="highlight-comment">' Set default precision to 64 bits.</span>
<spanclass="highlight-comment">' Release unmanaged memory allocated for x.</span>
gmp_lib.mpf_clear(x)</pre></div><divid="ID0EDAABA_code_Div3"class="codeSnippetContainerCode"style="display: none"><p>No code example is currently available or this language may not be supported.</p></div><divid="ID0EDAABA_code_Div4"class="codeSnippetContainerCode"style="display: none"><p>No code example is currently available or this language may not be supported.</p></div></div></div><scripttype="text/javascript">AddLanguageTabSet("ID0EDAABA");</script></div><divclass="collapsibleAreaRegion"id="seeAlsoSection"><spanclass="collapsibleRegionTitle"onclick="SectionExpandCollapse('ID4RB')"onkeypress="SectionExpandCollapse_CheckKey('ID4RB', event)"tabindex="0"><imgid="ID4RBToggle"class="collapseToggle"src="../icons/SectionExpanded.png"/>See Also</span></div><divid="ID4RBSection"class="collapsibleSection"><h4class="subHeading">Reference</h4><divclass="seeAlsoStyle"><ahref="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm">gmp_lib Class</a></div><divclass="seeAlsoStyle"><ahref="d9c51b9f-0c54-770b-28ea-6eebd8fef368.htm">Math.Gmp.Native Namespace</a></div><divclass="seeAlsoStyle"><ahref="e1edc21e-74a0-b44c-216b-bad204b5a48a.htm">gmp_lib<spanid="LST7BE69533_2"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST7BE69533_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpf_get_d_2exp(ptr<spanid="LST7BE69533_3"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST7BE69533_3?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script>Int32<spanid="LST7BE69533_4"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST7BE69533_4?cs=>|vb=)|cpp=>|fs=>|nu=)");</script>, mpf_t)</a></div><divclass="seeAlsoStyle"><ahref="d948e832-ee71-628a-6a7b-766138afff62.htm">gmp_lib<spanid="LST7BE69533_5"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST7BE69533_5?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpf_get_si(mpf_t)</a></div><divclass="seeAlsoStyle"><ahref="aa3fd0ea-a8b6-674b-59ff-b6d4785baed1.htm">gmp_lib<spanid="LST7BE69533_6"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST7BE69533_6?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpf_get_ui(mpf_t)</a></div><divclass="seeAlsoStyle"><ahref="bad56282-fbca-6e3b-03c8-085cff07eed8.htm">gmp_lib<spanid="LST7BE69533_7"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST7BE69533_7?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpf_get_str(char_ptr, ptr<spanid="LST7BE69533_8"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST7BE69533_8?cs=<|vb=(Of |cpp=<|fs=<'|nu=(");</script>mp_exp_t<spanid="LST7BE69533_9"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LST7BE69533_9?cs=>|vb=)|cpp=>|fs=>|nu=)");</script>, Int32, size_t, mpf_t)</a></div><divclass="seeAlsoStyle"><ahref="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm"><ahref="https://gmplib.org/manual/Converting-Floats.html#Converting-Floats">GNU MP - Converting Floats</a></a></div></div></div></div><divid="pageFooter"class="pageFooter"></div></body></html>