Class TRealFormat

class TRealFormat;

Description

Defines the character representation of a real number type such as a TReal or a TRealX.

An object of this type is used by functions that convert real values to character format, for example, the descriptor functions: Num(), AppendNum() and Format().

There are three constructors for constructing a suitable object. The data members of the class, however, are public and can be explicitly set after construction.

Members

Defined in TRealFormat:
TRealFormat(), TRealFormat(), TRealFormat(), iPlaces, iPoint, iTriLen, iTriad, iType, iWidth

IMPORT_C TRealFormat();

Description

Default constructor.

The public data members of the constructed object are assigned the following values:

TRealFormat::iType - set to KRealFormatGeneral

TRealFormat::iWidth - set to KDefaultRealWidth

TRealFormat::iPlaces - set to 0

TRealFormat::iPoint - set to the decimal separator character defined in a TLocale object and returned by the DecimalSeparator() member function of that class.

TRealFormat::iTriad - set to the character used to delimit groups of three digits in the integer portion of a number; the character is defined in a TLocale object and returned by the ThousandsSeparator() member function of that class.

TRealFormat::iTriLen - set to 1

IMPORT_C TRealFormat(TInt aWidth);

Description

Constructs the object taking the width of the character representation.

The remaining public data members of the constructed object are assigned the following values:

TRealFormat::iType - set to KRealFormatGeneral

TRealFormat::iWidth - set to the aWidth argument

TRealFormat::iPlaces - set to 0

TRealFormat::iPoint - set to the decimal separator character defined in a TLocale object and returned by the DecimalSeparator() member function of that class.

TRealFormat::iTriad - set to the character used to delimit groups of three digits in the integer portion of a number; the character is defined in a TLocale object and returned by the ThousandsSeparator() member function of that class.

TRealFormat::iTriLen - set to 1

Parameters

TInt aWidth The width of the character representation of the real number.

IMPORT_C TRealFormat(TInt aWidth, TInt aDecimalPlaces);

Description

Constructs the object taking the width of the character representation and a value which is interpreted as the number of digits to follow the decimal point.

The remaining public data members of the constructed object are assigned the following values:

TRealFormat::iType - set to KRealFormatFixed

TRealFormat::iWidth - set to the aWidth argument

TRealFormat::iPlaces - set to the aDecimals argument

TRealFormat::iPoint - set to the decimal separator character defined in a TLocale object and returned by the DecimalSeparator() member function of that class.

TRealFormat::iTriad - set to the character used to delimit groups of three digits in the integer portion of a number; the character is defined in a TLocale object and returned by the ThousandsSeparator() member function of that class.

TRealFormat::iTriLen - set to 1

Note that if the iType data member is changed after construction, aDecimalPlaces may be interpreted as the number of significant digits. For more information, see KRealFormatFixed and the other format types, and KExtraSpaceForSign and the other format flags.

Parameters

TInt aWidth The width of the character representation of the real number. TInt aDecimalPlaces The number of digits to follow the decimal point.

See also:

• TLocale::DecimalSeparator()
• TLocale::ThousandsSeparator()
• KRealFormatFixed
• KExtraSpaceForSign

TInt iType;

Description

Governs the format of the character representation of the real number.

This is set to one of the defined format types.

One or more of the defined format flags can subsequently be ORed into this member.

See also:

• KRealFormatFixed
• KRealFormatExponent
• KRealFormatGeneral
• KRealFormatNoExponent
• KRealFormatCalculator
• KExtraSpaceForSign
• KAllowThreeDigitExp
• KDoNotUseTriads
• KGeneralLimit
• KUseSigFigs

TInt iWidth;

Description

Defines the maximum number of characters required to represent the number.

TInt iPlaces;

Description

Defines either the number of characters to be used to represent the decimal portion of the number, or the maximum number of significant digits in the character representation of the number.

The interpretation depends on the chosen format as defined by iType.

See also:

• TRealFormat::iType

TChar iPoint;

Description

Defines the character to be used to separate the integer portion of a number representation from its decimal portion.

In general, the character used for this purpose is a matter of local convention. The TLocale::DecimalSeparator() function can supply the desired character.

See also:

• TLocale

TChar iTriad;

Description

Defines the character to be used to delimit groups of three digits in the integer part of the number.

In general, the character used for this purpose is a matter of local convention. The TLocale::ThousandsSeparator() function can supply the desired character.

See also:

• TLocale

TInt iTriLen;

Description

Defines the threshold number of digits above which triad separation is to occur. A value of zero disables triad separation and no triad separation character (i.e. the character held in iTriad) is inserted into the resulting character representation regardless of the number of characters.

For example, a value of 1 causes the number 1000 to be represented by the characters "1,000" whereas a value of 4 causes the same number to be represented by the characters "1000" (This assumes the ‘,’ triad separation character).

Note that no triad separation occurs if the flag KDoNotUseTriads is set in the iType data member.

See also:

• TRealFormat::iTriad
• KDoNotUseTriads