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Division and square root are not enabled by default since Cgal release 3.2, since they are computed approximately. We suggest that you use rationals like Quotient<MP_Float> when you need exact divisions.
Note on the implementation : although the mantissa length is basically only limited by the available memory, the exponent is currently represented by a (integral valued) double, which can overflow in some circumstances. We plan to also have a multiprecision exponent to fix this issue.
#include <CGAL/MP_Float.h>
| MP_Float m; | |
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introduces an uninitialized variable m.
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| MP_Float m ( MP_Float); | |
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copy constructor.
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| MP_Float m ( int i); | |
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introduces the integral value i.
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| MP_Float m ( float d); | |
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introduces the floating point value d (exact conversion).
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| MP_Float m ( double d); | |
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introduces the floating point value d (exact conversion).
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| MP_Float m ( long double d); | |
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introduces the floating point value d (exact conversion).
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| std::ostream& | std::ostream& out << m | writes a double approximation of m to the ostream out. |
| std::istream& | std::istream& in >> & m | reads a double from in, then converts it to an MP_Float. |
| MP_Float | approximate_division ( a, b) | computes an approximation of the division by converting the operands to double, performing the division on double, and converting back to MP_Float. |
| MP_Float | approximate_sqrt ( a) | computes an approximation of the square root by converting the operand to double, performing the square root on double, and converting back to MP_Float. |