uTools-Manuals/docs/c/modf.html
2019-04-21 11:50:48 +08:00

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<h1>数学函数 - modf</h1>
<p>原型extern float modf(float num, float *i);</p>
<p>用法:#include &lt;math.h></p>
<p>功能将浮点数num分解成整数部分和小数部分。</p>
<p>说明:返回小数部分,将整数部分存入*i所指内存中。</p>
举例:<pre><code class="language-c">
// modf.c
#include &lt;syslib.h>
#include &lt;math.h>
main()
{
float x, i;
clrscr(); // clear screen
textmode(0x00); // 6 lines per LCD screen
x=modf(-74.12,&i);
printf("-74.12=%.0f+(%.2f)",i,x);
getchar();
return 0;
}
</code></pre>相关函数:<a href="frexp.html">frexp</a>,<a href="ldexp.html">ldexp</a>