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Annotation of coherent/a/usr/man/ALL/modf, revision 1.1.1.1

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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