Version 5.0 The LEDA User Manual

integer
integer
a(const char ∗ s);
a(const string& s);
a creates an instance a of type integer from its decimal representation
given by the string s.
a creates an instance a of type integer from its decimal representation
given by the string s.
3. Operations
The arithmetic operations +, −, ∗, /, + =, − =, ∗ =, / =, −(unary), ++, −−, the
modulus operation (%, % =), bitwise AND (&, & =), bitwise OR (|, | =), the complement
(˜), the shift operations (), the comparison operations =, ==, ! =
and the stream operations all are available.
int a.sign( ) returns the sign of a.
int a.length( ) returns the number of bits of the representation of
a.
bool a.is long( ) returns whether a fits in the data type long.
long a.to long( ) returns a long number which is initialized with the
value of a. Precondition: a.is long() is true.
double a.to double( ) returns a double floating point approximation of a.
double
a.to double(bool& is double)
as above, but also returns in is double whether the
conversion was exact.
double a.to float( ) as above.
string a.to string( ) returns the decimal representation of a.
integer& a.from string(string s) sets a to the number that has decimal respresentation
s.
sz t a.used words( ) returns the length of the digit vector that represents
a.
digit a.highword( ) returns the most significant digit of a.
digit a.contents(int i) returns the i-th digit of a (the first digit is
a.contents(0)).
void a.hex print(ostream& o) prints the digit vector that represents a in hex format
to the output stream o.
bool a.iszero( ) returns whether a is equal to zero.