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<title>HUGE_VALF, HUGE_VAL, HUGE_VALL</title>
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<h1 id="firstHeading" class="firstHeading">HUGE_VALF, HUGE_VAL, HUGE_VALL</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="c.html">c</a>&lrm; | <a href="c-numeric.html">numeric</a>&lrm; | <a href="c-numeric-math.html">math</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code>&lt;math.h&gt;</code></div>
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<div><span class="mw-geshi c source-c"><span class="co2">#define HUGE_VALF /*implementation defined*/</span></span></div>
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<td><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
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<div><span class="mw-geshi c source-c"><span class="co2">#define HUGE_VAL &nbsp;/*implementation defined*/</span></span></div>
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<div><span class="mw-geshi c source-c"><span class="co2">#define HUGE_VALL /*implementation defined*/</span></span></div>
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<td><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
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<p><code>HUGE_VALF</code> &#12289; <code>HUGE_VAL</code> &#21644; <code>HUGE_VALL</code> &#23439;&#23637;&#24320;&#25104;&#27491;&#28014;&#28857;&#24120;&#37327;&#34920;&#36798;&#24335;&#65292;&#23427;&#20204;&#27604;&#36739;&#31561;&#20110;&#19978;&#28322;&#24773;&#20917;&#20013;&#28014;&#28857;&#20989;&#25968;&#21644;&#36816;&#31639;&#31526;&#30340;&#36820;&#22238;&#20540;&#65288;&#35265; <a href="c-numeric-math-math_errhandling.html"><tt>math_errhandling</tt></a> &#65289;&#12290;</p>
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<td>&#24120;&#37327;</td>
<td>&#35299;&#37322;</td>
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<td><code>HUGE_VALF</code></td>
<td>&#23637;&#24320;&#25104;&#25351;&#31034;&#19978;&#28322;&#30340;&#27491; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">float</span></span></span> &#34920;&#36798;&#24335;</td>
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<td><code>HUGE_VAL</code></td>
<td>&#23637;&#24320;&#25104;&#25351;&#31034;&#19978;&#28322;&#30340;&#27491; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">double</span></span></span> &#34920;&#36798;&#24335;&#65292;&#19981;&#24517;&#21487;&#34920;&#31034;&#20026; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">float</span></span></span></td>
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<td><code>HUGE_VALL</code></td>
<td>&#23637;&#24320;&#25104;&#25351;&#31034;&#19978;&#28322;&#30340;&#27491; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">double</span></span></span> &#34920;&#36798;&#24335;&#65292;&#19981;&#24517;&#21487;&#34920;&#31034;&#20026; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">float</span></span></span> &#25110; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">double</span></span></span></td>
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<p>&#22312;&#25903;&#25345;&#28014;&#28857;&#26080;&#31351;&#22823;&#30340;&#24179;&#21488;&#19978;&#65292;&#36825;&#20123;&#23439;&#22987;&#32456;&#20998;&#21035;&#23637;&#24320;&#25104; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">float</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">double</span></span></span> &#21644; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">double</span></span></span> &#30340;&#27491;&#26080;&#31351;&#22823;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;math.h&gt;</span>
<span class="co2">#include &lt;stdio.h&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw4">double</span> result <span class="sy1">=</span> <span class="nu16">1.0</span><span class="sy2">/</span><span class="nu16">0.0</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw848">printf</span></a><span class="br0">(</span><span class="st0">&quot;1.0/0.0 = %f<span class="es1">\n</span>&quot;</span>, result<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span>result <span class="sy1">==</span> HUGE_VAL<span class="br0">)</span>
<a href="c-io-puts.html"><span class="kw833">puts</span></a><span class="br0">(</span><span class="st0">&quot;1.0/0.0 == HUGE_VAL<span class="es1">\n</span>&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#21487;&#33021;&#30340;&#36755;&#20986;&#65306;</p>
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<pre class="de1">1.0/0.0 = inf
1.0/0.0 == HUGE_VAL</pre></div>
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<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">&#24341;&#29992;</span></h3>
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<ul>
<li>C11 &#26631;&#20934;&#65288;ISO/IEC 9899:2011&#65289;&#65306;</li>
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<li>7.12/3 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: 231)</li>
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<ul>
<li>F.10/2 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: 517)</li>
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<div class="t-ref-std-c99">
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<li>C99 &#26631;&#20934;&#65288;ISO/IEC 9899:1999&#65289;&#65306;</li>
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<li>7.12/3 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: 212)</li>
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<dd>
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<li>F.9/2 HUGE_VAL, HUGE_VALF, HUGE_VALL (p: 454)</li>
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<div class="t-ref-std-c89">
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<li>C89/C90 &#26631;&#20934;&#65288;ISO/IEC 9899:1990&#65289;&#65306;</li>
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<li>4.5 HUGE_VAL</li>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="c-numeric-math-INFINITY.html"><span class="t-lines"><span>INFINITY</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
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<td>&#27714;&#20540;&#20026;&#27491;&#26080;&#31351;&#22823;&#25110;&#20445;&#35777;&#28322;&#20986; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">float</span></span></span> &#30340;&#20540;<br />
<span class="t-mark">(&#23439;&#24120;&#37327;)</span></td>
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