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PART II
C h a p t e r 2 1 :
E x p l o r i n g t h e S y s t e m N a m e s p a c e
631
using System;
class CreateDec {
static void Main() {
decimal d = new decimal(12345, 0, 0, false, 2);
Console.WriteLine(d);
}
}
The output is shown here:
123.45
In this example, the value of the 96-bit integer is 12345. Its sign is positive, and it has two
decimal fractions.
The methods defined by
Decimal
are shown in Table 21-7. The fields defined by
Decimal
are shown in Table 21-8.
Decimal
also defines a large number of operators and conversions
that allow
decimal
values to be used in expressions with other numeric types. The rules
governing the use of
decimal
in expressions and assignments are described in Chapter 3.
Method
Meaning
public static decimal Add(decimal
v1
,
decimal
v2
)
Returns
v1
+
v2.
public static decimal Ceiling(decimal
v
)
Returns the smallest integer (represented as a
decimal
value) not less than
v.
For example, given
1.02,
Ceiling( )
returns 2.0. Given –1.02,
Ceiling( )
returns –1.
public static int Compare(decimal
v1
,
decimal
v2
)
Compares the numerical value of
v1
with that of
v2.
Returns zero if the values are equal. Returns a
negative value if
v1
is less than
v2.
Returns a positive
value if
v1
is greater than
v2.
public int CompareTo(object
v
)
Compares the numerical value of the invoking object
with that of
v.
Returns zero if the values are equal.
Returns a negative value if the invoking object has a
lower value. Returns a positive value if the invoking
object has a greater value.
public int CompareTo(decimal
v
)
Compares the numerical value of the invoking object
with that of
v.
Returns zero if the values are equal.
Returns a negative value if the invoking object has a
lower value. Returns a positive value if the invoking
object has a greater value.
public static decimal Divide(decimal
v1
,
decimal
v2
)
Returns
v1
/
v2.
public bool Equals(decimal
v
)
Returns true if the value of the invoking object equals
the value of
v.
T
ABLE
21-7
Methods Defi ned by
Decimal
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632
P a r t I I :
E x p l o r i n g t h e C # L i b r a r y
public override bool Equals(object
v
)
Returns true if the value of the invoking object equals
the value of
v.
public static bool Equals(decimal
v1
,
decimal
v2
)
Returns true if
v1
equals
v2.
public static decimal Floor(decimal
v
)
Returns the largest integer (represented as a
decimal
value) not greater than
v.
For example, given 1.02,
Floor( )
returns 1.0. Given –1.02,
Floor( )
returns –2.
public static decimal
FromOACurrency(long
v
)
Conver ts the OLE Automation currency value in
v
into
its
decimal
equivalent and returns the result.
public static int[ ] GetBits(decimal
v
)
Returns the binar y representation of
v
as an array of
int
. The organization of this array is as described in
the text.
public override int GetHashCode( )
Returns the hash code for the invoking object.
public TypeCode GetTypeCode( )
Returns the
TypeCode
enumeration value for
Decimal
,
which is
TypeCode.Decimal
.
public static decimal Multiply(decimal
v1
,
decimal
v2
)
Returns
v1
*
v2.
public static decimal Negate(decimal
v
)
Returns –
v.
public static decimal Parse(string
str
)
Returns the binar y equivalent of the numeric string in
str.
If the string does not represent a
decimal
value,
an exception is thrown.
public static decimal
Parse(string
str
,
IFormatProvider
fmtpvdr
)
Returns the binar y equivalent of the numeric string
in
str
using the culture-specific information provided
by
fmtpvdr.
If the string does not represent a
decimal
value, an exception is thrown.
public static decimal
Parse(string
str
, NumberStyles
styles
)
Returns the binar y equivalent of the numeric string
in
str,
using the style information provided by
styles.
If the string does not represent a
decimal
value, an
exception is thrown.
public static decimal
Parse(string
str
,
NumberStyles
styles
,
IFormatProvider
fmtpvdr
)
Returns the binar y equivalent of the numeric string
in
str
using the style information provided by
styles
and the culture-specific format information provided
by
fmtpvdr.
If the string does not represent a
decimal
value, an exception is thrown.
public static decimal
Remainder(decimal
v1
, decimal
v2
)
Returns the remainder of the integer division
v1
/
v2.
public static decimal Round(decimal
v
)
Returns the value of
v
rounded to the nearest whole
number.
public static decimal
Round(decimal
v
, int
decPlaces
)
Returns the value of
v
rounded to the number of
decimal places specified by
decPlaces,
which must
be between 0 and 28.
T
ABLE
21-7
Methods Defi ned by
Decimal
(continued)
Method
Meaning
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