データ型

COBOL のデータ型

Value Types
condition-value
binary-char (unsigned)
character
binary-short, binary-long, binary-double (unsigned)
float-short, float-long
decimal
DateTime (not a built-in COBOL type)

Reference types
object
string

Initializing
01 correct condition-value value true.
01 b binary-char unsigned value h"2a".  *> Hex
01 o binary-char ussigned value o"52".  *> Octal
01 person object value null.
01 nam string value "Dwight".
01 grade character value "B".
01 today type DateTime value type DateTime::Parse("12/31/2007 12:15:00").
01 amount decimal value 35.99.
01 gpa float-short value 2.9.
01 pi float-long value 3.14159265.
01 lTotal binary-double value 123456.
01 sTotal binary-short value 123.
01 usTotal binary-short unsigned value 123.
01 uiTotal binary-long value 123.
01 ulTotal binary-long unsigned value 123.

Type Information
01 x binary-long.
display x::GetType            *> Prints System.Int32
display type of binary-long   *> Prints System.Int32
display x::GetType::Name      *> Prints Int32

Type Conversion
01 d float-short value 3.5.   *> automatic conversion
set i to d as binary-long     *> set to 3 (truncates decimal)

COBOL types not supported in C# or VB.Net
*> Only a few examples here
01 displayNumber pic 9(9).99.
01 computeNumber pic 9(9)V99.
01 alphaNumberic pic a(23).
01 binaryStorage pic x(12).
*> Also groups and redefines - a few examples
01 arecord.
   03 aSubRecord pic x(10).
   03 aUnion     pic 9(10) redefines aSubrecord.

C# のデータ型

Value Types
bool
byte, sbyte
char
short, ushort, int, uint, long, ulong
float, double
decimal
DateTime   (not a built-in C# type)

Reference Types
object
string

Initializing
bool correct = true;
byte b = 0x2A;   // hex

object person = null;
string name = "Dwight";
char grade = 'B';
DateTime today = DateTime.Parse("12/31/2007 12:15:00");
decimal amount = 35.99m;
float gpa = 2.9f;
double pi = 3.14159265;
long lTotal = 123456L;
short sTotal = 123;
ushort usTotal = 123;
uint uiTotal = 123;
ulong ulTotal = 123;

Type Information
int x;
Console.WriteLine(x.GetType());        // Prints System.Int32
Console.WriteLine(typeof(int));        // Prints System.Int32
Console.WriteLine(x.GetType().Name);   // prints Int32

Type Conversion
float d = 3.5f;
int i = (int)d;   // set to 3  (truncates decimal)

VB.NET のデータ型

Value Types
Boolean
Byte, SByte
Char
Short, UShort, Integer, UInteger, Long, ULong
Single, Double
Decimal
Date

Reference Types
Object
String

Initializing
Dim correct As Boolean = True
Dim b As Byte = &H2A   'hex
Dim o As Byte = &O52   'octal
Dim person As Object = Nothing
Dim name As String = "Dwight"
Dim grade As Char = "B"c
Dim today As Date = #12/31/2007 12:15:00 PM#
Dim amount As Decimal = 35.99@
Dim gpa As Single = 2.9!
Dim pi As Double = 3.14159265
Dim lTotal As Long = 123456L
Dim sTotal As Short = 123S
Dim usTotal As UShort = 123US
Dim uiTotal As UInteger = 123UI
Dim ulTotal As ULong = 123UL

Type Information
Dim x As Integer
Console.WriteLine(x.GetType())        ' Prints System.Int32
Console.WriteLine(GetType(Integer))   ' Prints System.Int32
Console.WriteLine(TypeName(x))        ' Prints Integer

Type Conversion
Dim d As Single = 3.5
Dim i As Integer = CType(d, Integer)   ' set to 4 (Banker's rounding)
i = CInt(d)   ' same result as CType
i = Int(d)    ' set to 3 (Int function truncates the decimal)

これらの例の一部は、ハーディング大学コンピューター サイエンス学部の Frank McCown 博士が作成したもので、クリエイティブ コモンズ ライセンスに基づいて使用が許可されています。