Node:Rational Conversions, Next:Rational Arithmetic, Previous:Initializing Rationals, Up:Rational Number Functions

Conversion Functions

double mpq_get_d (mpq_t op)

Function

Convert op to a double.

void mpq_set_d (mpq_t rop, double op)	Function
void mpq_set_f (mpq_t rop, mpf_t op)	Function

Set rop to the value of op, without rounding.

char * mpq_get_str (char *str, int base, mpq_t op)

Function

Convert op to a string of digits in base base. The base may vary from 2 to 36. The string will be of the form num/den, or if the denominator is 1 then just num. If str is NULL, the result string is allocated using the current allocation function (see Custom Allocation). The block will be strlen(str)+1 bytes, that being exactly enough for the string and null-terminator. If str is not NULL, it should point to a block of storage large enough for the result, that being mpz_sizeinbase (mpq_numref(op), base) + mpz_sizeinbase (mpq_denref(op), base) + 3 The three extra bytes are for a possible minus sign, possible slash, and the null-terminator. A pointer to the result string is returned, being either the allocated block, or the given str.