If it is modified by someone else and passed on, we want their recipients to know that what they have is not what we distributed, so that any problems introduced by others will not reflect on our reputation. Set rop to the square root of op rounded in the direction rnd. Before you can assign to an MPFR variable, you need to initialize it by calling one of the special initialization functions. A pointer to the block is stored in str. Function Index , Previous: MPFR behaves as if it computed the result with an infinite precision, then rounded it to the precision of this variable. I already installed libgmp 5.
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It can possibly yield undefined behavior, as the result may not be normalized if MPFR had been built with the –enable-assert configure option, an assertion failure occurs in such a case. Unless documented otherwise, functions returning a 1 or any other mmpfr specified in this manual for special cases like acos 0 should return an overflow or an underflow if 1 is not representable in the current exponent range.
All the Mpfd versions up to version 3. A range exception occurs when a function that does not return a MPFR number such as comparisons and conversions to an integer has an 2.0 result e. Set rop to the arc-tangent2 of y and xrounded in the direction rnd: These functions are only kept for compatibility with MPF.
For negative xthe returned value is NaN.
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This problem is fixed in the printf-hh-ll patch. So that such applications are able to use MPFR, an auxiliary memory interface has been mpft PREC x is not modified by this function. Set rop to op1 times 2 raised to op2 rounded in the direction rnd. Integer Related FunctionsUp: The variables iop and fop must be different.
To make sure that everyone has such rights, we have to forbid you to deprive anyone else of these rights. A NaN exception occurs when the result of a function is a NaN.
You also have to explain what is wrong; if you get a crash, or if the results printed are incorrect and in that case, in what way. There are a few things you should think about when you put your bug report together.
Formatted Output FunctionsUp: Miscellaneous FunctionsUp: An underflow occurs when the exact result of a function is a non-zero real number and the result obtained after the rounding, assuming an unbounded exponent range for the roundinghas an exponent smaller than the minimum exponent of the current range. If it is modified by someone else and passed on, we want their recipients to know that what they have is not what we distributed, so that any problems introduced by others will not reflect on our reputation.
Read a floating-point number from a string nptr in base baserounded in the direction rnd ; base must be either 0 to detect the base, as described below or a number from 2 to 36 otherwise the behavior is undefined.
Comparison of multiple-precision floating-point software
What every MPFR user should now. Parsing follows the standard C strtod function with some extensions. Otherwise the behavior is undefined. Do not use it if you want to know whether two numbers are close to each other; for instance, 1.
Changelog for MPFR
This is a preliminary interface. Initialize x and set its value to NaN.
configure: error: Building GCC requires GMP +, MPFR + and MPC +. – 程序园
This default precision is set to 53 bits initially. Comparison FunctionsPrevious: Set rop to the value of the complementary error function on oprounded in the direction rnd.