LongNums

A custom made proof-of-concept class for arbitrary precision arithmetic.
Supports only integers.

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Table of Operations

Key for examples-

Capitalised variables indicate `LongNumber` objects. Lower case variables indicate `int`s or `long`s.

Operation	Function/ Operator	Example	Notes
Input	>>	std::cin >> X;
Output	<<	std::cout << X;
Assignment	=	X = y; X = 123; X = "-112";	Can equate with a long, LongNumber or a std::string. Will throw a InvalidInputException if it is unable to parse the string.
Comparison	< > == !=	X < Y; X > 1123; X == y; X != 0;	Can compare a LongNumber with other LongNumbers, as well as longs and std::strings. Can use combined comparisons like <= or >=.
Addition	+ += ++	X + y; X + Y; X += Y; X++; ++X;	Can add with longs as well as LongNumbers. Each notation has its standard meaning.
Subtraction	- -= --	X - y; X - Y; X -= Y; X--; --X;	Can subtract longs as well as LongNumbers from the LongNumber. Each notation has its standard meaning.
Multiplication	* *=	X * y; X * Y; X *= Y;	Can multiply with longs as well as LongNumbers. Each notation has its standard meaning.
Division	/ /=	X / y; X / Y; X /= Y;	Can divide with longs as well as LongNumbers. Each notation has its standard meaning. Dividing by zero will throw a DivisionByZero exception.
Modulo	% %=	X % y; X % Y; X %= Y;	Can find the modulus of LongNumber with longs as well as LongNumbers. Each notation has its standard meaning. Finding the modulus with 0 will throw a DivisionByZero exception.
Absolute	absolute()	X.absolute()	Returns a LongNumber. Will not change the contents of X.
Cast to Long	toLong()	X.toLong()	Returns a long. Does not account for overflow.

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Exceptions

Name	Function
DivideByZeroException	Thrown when any attempt is made to divide by 0.
InvalidInputException	Thrown when the entered string does not correspond to an integer.