Version 5.0 The LEDA User Manual

5.12 Vectors with Integer Entries ( integer vector )
1. Definition
An instance of data type integer vector is a vector of variables of type integer, the so called
ring type. Together with the type integer matrix it realizes the basic operations of linear
algebra. Internal correctness tests are executed if compiled with the flag LA SELFTEST.
#include < LEDA/numbers/integer vector.h >
2. Creation
integer vector v; creates an instance v of type integer vector. v is initialized to
the zero-dimensional vector.
integer vector v(int d); creates an instance v of type integer vector. v is initialized to
a vector of dimension d.
integer vector
integer vector
v(const integer& a, const integer& b);
creates an instance v of type integer vector. v is initialized to
the two-dimensional vector (a, b).
v(const integer& a, const integer& b, const integer& c);
creates an instance v of type integer vector. v is initialized to
the three-dimensional vector (a, b, c).
integer vector v(const integer& a, const integer& b, const integer& c,
const integer& d);
creates an instance v of type integer vector; v is initialized to
the four-dimensional vector (a, b, c, d).
3. Operations
int v.dim( ) returns the dimension of v.
integer& v[int i] returns i-th component of v.
Precondition: 0 ≤ i ≤ v.dim( ) − 1.
integer vector&
integer vector&
v += const integer vector& v1
v −= const integer vector& v1
Addition plus assignment.
Precondition: v.dim( ) == v1.dim( ).
Subtraction plus assignment.
Precondition: v.dim( ) == v1.dim( ).