May 2003
Intermediate to advanced
566 pages
27h 29m
English
Content preview from Cocoa in a Nutshell
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Name
NSDecimalNumber — Mac OS X 10.0
Synopsis
This subclass of NSNumber provides an
object-oriented wrapper for performing base-10 arithmetic
operations. Instances of NSDecimalNumber are
created with a string such as
“10.2e4” using
decimalNumberWithString:, or by specifying the
mantissa, exponent, and whether or not it is negative in the method
decimalNumberWith-Mantissa:exponent:isNegative:.
Arithmetic operations are performed
on two decimal number objects using methods such as
decimalNumberByAdding:,
decimalNumberByMultiplying:, and so forth. The
value of the decimal number can be accessed as a
double by sending a doubleValue
message to the object.
|
|
@interface NSDecimalNumber : NSNumber
|
// Initializers
|
- (id)initWithDecimal:(NSDecimal)dcm; |
- (id)initWithMantissa:(unsigned long long)mantissa exponent:(short)exponent isNegative:(BOOL)flag; |
- (id)initWithString:(NSString *)numberValue; |
- (id)initWithString:(NSString *)numberValue locale:(NSDictionary *)locale; |
// Class Methods
|
+ (NSDecimalNumber *)decimalNumberWithDecimal:(NSDecimal)dcm; |
+ (NSDecimalNumber *)decimalNumberWithMantissa:(unsigned long long)mantissa exponent:(short)exponent isNegative:(BOOL)flag; |
+ (NSDecimalNumber *)decimalNumberWithString:(NSString *)numberValue; |
+ (NSDecimalNumber *)decimalNumberWithString:(NSString *)numberValue locale:(NSDictionary *)locale; |
+ (id <NSDecimalNumberBehaviors>) ... |
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