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Annotation of coherent/a/usr/man/ALL/modf, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: modf()                   General Function                  modf()
        !             4: 
        !             5: 
        !             6: 
        !             7: 
        !             8: Separate integral part and fraction
        !             9: 
        !            10: ddoouubbllee mmooddff(_r_e_a_l, _i_p) ddoouubbllee _r_e_a_l, *_i_p;
        !            11: 
        !            12: modf  is the  floating-point  modulus function.   It returns  the
        !            13: fractional part of  its argument real, which is a  value f in the
        !            14: range 0 <= _f < 1.  It also stores the integral part in the double
        !            15: location referenced  by ip.   These numbers satisfy  the equation
        !            16: _r_e_a_l = _f + *_i_p.
        !            17: 
        !            18: ***** Example *****
        !            19: 
        !            20: This example  prompts for a  number from the  keyboard, then uses
        !            21: mmooddff to calculate the number's fractional portion.
        !            22: 
        !            23: 
        !            24: #include <stdio.h>
        !            25: 
        !            26: main()
        !            27: {
        !            28:         extern char *gets();
        !            29:         extern double modf(), atof();
        !            30:         double real, fp, ip;
        !            31:         char string[64];
        !            32: 
        !            33: 
        !            34: 
        !            35:         for (;;) {
        !            36:                 printf("Enter number: ");
        !            37:                 if (gets(string) == 0)
        !            38:                         break;
        !            39: 
        !            40: 
        !            41: 
        !            42:                 real = atof(string);
        !            43:                 fp = modf(real, &ip);
        !            44:                 printf("%lf is the integral part of %lf\n",
        !            45:                         ip, real);
        !            46:                 printf("%lf is the fractional part of %lf\n",
        !            47:                         fp, real);
        !            48:         }
        !            49: }
        !            50: 
        !            51: 
        !            52: ***** See Also *****
        !            53: 
        !            54: atof(),  ceil(),  fabs(),  floor(),  frexp(),  general  function,
        !            55: ldexp()
        !            56: 
        !            57: 
        !            58: 
        !            59: 
        !            60: 
        !            61: 
        !            62: 
        !            63: 
        !            64: COHERENT Lexicon                                           Page 1
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