GNU Info

(gmp.info)C++ Formatted Input

---

Prev: Formatted Input Functions Up: Formatted Input

---

Enter node , (file) or (file)node

C++ Formatted Input
===================

   The following functions are provided in `libgmpxx', which is built
only if C++ support is enabled (Note: Build Options).  Prototypes are
available from `<gmp.h>'.

 - Function: istream& operator>> (istream& STREAM, mpz_t ROP)
     Read ROP from STREAM, using its `ios' formatting settings.

 - Function: istream& operator>> (istream& STREAM, mpq_t ROP)
     Read ROP from STREAM, using its `ios' formatting settings.

     An integer like `123' will be read, or a fraction like `5/9'.  If
     the fraction is not in canonical form then `mpq_canonicalize' must
     be called (Note: Rational Number Functions).

 - Function: istream& operator>> (istream& STREAM, mpf_t ROP)
     Read ROP from STREAM, using its `ios' formatting settings.

     Hex or octal floats are not supported, but might be in the future.

   These operators mean that GMP types can be read in the usual C++
way, for example,

     mpz_t  z;
     ...
     cin >> z;

   But note that `istream' input (and `ostream' output, Note: C++
Formatted Output) is the only overloading available and using for
instance `+' with an `mpz_t' will have unpredictable results.