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public interface InfiniteIntegerInterface
{
/**
* Gets the number of digits of this infinite integer.
* @return an integer representing the number of digits
* of this infinite integer.
*/
public int getNumberOfDigits();
/**
* Checks whether this infinite integer is a negative number.
* @return true if this infinite integer is a negative number.
* Otherwise, return false.
*/
public boolean isNegative();
/**
* Calculates the result of this infinite integer plus anInfiniteInteger
* @param anInfiniteInteger the infinite integer to be added.
* @return a NEW infinite integer representing the result of this
* infinite integer plus anInfiniteInteger
*/
public InfiniteIntegerInterface plus(final InfiniteIntegerInterface anInfiniteInteger);
/**
* Calculates the result of this infinite integer subtracted by anInfiniteInteger
* @param anInfiniteInteger the infinite integer to subtract.
* @return a NEW infinite integer representing the result of this
* infinite integer subtracted by anInfiniteInteger
*/
public InfiniteIntegerInterface minus(final InfiniteIntegerInterface anInfiniteInteger);
/**
* Calculates the result of this infinite integer multiplied by anInfiniteInteger
* @param anInfiniteInteger the multiplier.
* @return a NEW infinite integer representing the result of this
* infinite integer multiplied by anInfiniteInteger.
*/
public InfiniteIntegerInterface multiply(final InfiniteIntegerInterface anInfiniteInteger);
/**
* Generates a string representing this infinite integer. If this infinite integer
* is a negative number a minus symbol should be in the front of numbers. For example,
* "-12345678901234567890". But if the infinite integer is a positive number, no symbol
* should be in the front of the numbers (e.g., "12345678901234567890").
* @return a string representing this infinite integer number.
*/
public String toString();
/**
* Compares this infinite integer with anInfiniteInteger
* @return either -1, 0, or 1 as follows:
* If this infinite integer is less than anInfiniteInteger, return -1.
* If this infinite integer is equal to anInfiniteInteger, return 0.
* If this infinite integer is greater than anInfiniteInteger, return 1.
*/
public int compareTo(final InfiniteIntegerInterface anInfiniteInteger);
}
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