(gmp.info.gz) Initializing Rationals

(gmp.info.gz) Rational Number Functions

(gmp.info.gz) Rational Conversions

 
 Initialization and Assignment Functions
 =======================================
 
  - Function: void mpq_init (mpq_t DEST_RATIONAL)
      Initialize DEST_RATIONAL and set it to 0/1.  Each variable should
      normally only be initialized once, or at least cleared out (using
      the function `mpq_clear') between each initialization.
 
  - Function: void mpq_clear (mpq_t RATIONAL_NUMBER)
      Free the space occupied by RATIONAL_NUMBER.  Make sure to call this
      function for all `mpq_t' variables when you are done with them.
 
  - Function: void mpq_set (mpq_t ROP, mpq_t OP)
  - Function: void mpq_set_z (mpq_t ROP, mpz_t OP)
      Assign ROP from OP.
 
  - Function: void mpq_set_ui (mpq_t ROP, unsigned long int OP1,
           unsigned long int OP2)
  - Function: void mpq_set_si (mpq_t ROP, signed long int OP1, unsigned
           long int OP2)
      Set the value of ROP to OP1/OP2.  Note that if OP1 and OP2 have
      common factors, ROP has to be passed to `mpq_canonicalize' before
      any operations are performed on ROP.
 
  - Function: int mpq_set_str (mpq_t ROP, char *STR, int BASE)
      Set ROP from a null-terminated string STR in the given BASE.
 
      The string can be an integer like "41" or a fraction like
      "41/152".  The fraction must be in canonical form ( Rational
      Number Functions), or if not then `mpq_canonicalize' must be
      called.
 
      The numerator and optional denominator are parsed the same as in
      `mpz_set_str' ( Assigning Integers).  White space is
      allowed in the string, and is simply ignored.  The BASE can vary
      from 2 to 62, or if BASE is 0 then the leading characters are
      used: `0x' or `0X' for hex, `0b' or `0B' for binary, `0' for
      octal, or decimal otherwise.  Note that this is done separately
      for the numerator and denominator, so for instance `0xEF/100' is
      239/100, whereas `0xEF/0x100' is 239/256.
 
      The return value is 0 if the entire string is a valid number, or
      -1 if not.
 
  - Function: void mpq_swap (mpq_t ROP1, mpq_t ROP2)
      Swap the values ROP1 and ROP2 efficiently.

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(gmp.info.gz) Rational Number Functions

(gmp.info.gz) Rational Conversions

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