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