TECHNICAL ISO/IEC TR REPORT 24733 First edition 2011-11-01 Information technology Programming languages, their environments and system software interfaces Extensions for the programming language C++ to support decimal floating-point arithmetic TechnologiesdeI'informationLangagesdeprogrammation,leurs langagedeprogrammationC++poursupporterI'arithmetiqueflottante decimale Reference number ISO/IEC TR 24733:2011(E) E( @ISO/IEC2011 ISO/IECTR24733:2011(E) COPYRIGHTPROTECTEDDOCUMENT ? ISO/IEC2011 IsO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO/IEC 2011 - All rights reserved ISO/IEC TR24733:2011(E) Contents Page Foreword. vi Introduction .vii 0.1 General. vii 0.2 Arithmetic model 0.3 The Formats .. . vili 1 Scope... 2 Normative references. 3Conventions. 3.1 General.. 3.2 Relation to C++ Standard Library Introduction 3.3Relation to"Technical Report on C++LibraryExtensions" 3.4Categories ofextensions 3.5 Namespaces and headers... 4 Decimal floating-point types 5 4.1 Characteristics of decimal floating-point types... 4.2 Decimal Types... 6 4.2.1Header<decimal> synopsis.. 4.2.2Class decimal32 10 4.2.2.1 Class summary . 10 4.2.2.2Construct/copy/destroy. 11 4.2.2.3 Conversion from floating-point type 4.2.2.4 Conversion from integral type ... 4.2.2.5 Conversion to integral type.. 4.2.2.6 Increment and decrement operators .... 12 4.2.2.7 Compound assignment.. 12 4.2.3 Class decimal164.. 4.2.3.1 Class summary 14 4.2.3.2Construct/copy/destroy.. 14 4.2.3.3Conversion from floating-point type 14 4.2.3.4Conversionfrom integraltype 15 4.2.3.5 Conversion to integral type. 15 15 4.2.3.6Incrementand decrementoperators.. 4.2.3.7 Compound assignment... 16 4.2.4Classdecima1128 17 4.2.4.1 Class summary 4.2.4.2 Construct/copy/destroy... 17 4.2.4.3Conversion from floating-pointtype 17 4.2.4.4Conversionfrom integral type 18 4.2.4.5 Conversion to integral type.... 18 4.2.4.6Increment and decrement operators.. 18 4.2.4.7 Compound assignment. 19 4.2.5Initialization from coefficientand exponent.. 20 reserve