Version 5.0 The LEDA User Manual

Chapter 5
Number Types and Linear Algebra
5.1 Integers of Arbitrary Length ( integer )
1. Definition
An instance of the data type integer is an integer number of arbitrary length. The internal
representation of an integer consists of a vector of so-called digits and a sign bit. A digit
is an unsigned long integer (type unsigned long).
#include < LEDA/numbers/integer.h >
2. Creation
integer a; creates an instance a of type integer and initializes it with zero.
integer a(int n); creates an instance a of type integer and initializes it with the value
of n.
integer
a(unsigned int i);
creates an instance a of type integer and initializes it with the value
of i.
integer a(long l); creates an instance a of type integer and initializes it with the value
of l.
integer
integer
a(unsigned long i);
creates an instance a of type integer and initializes it with the value
of i.
a(double x); creates an instance a of type integer and initializes it with the
integral part of x.
integer a(unsigned int sz, const digit ∗ vec, int sign = 1);
creates an instance a of type integer and initializes it with the value
represented by the first sz digits vec and the sign.
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