EntityQ307472· pop 11· linked from 9 articles#pragma onceSign in to savedirective in C and C++ provided as a language extensionConnectionsQ15777EntityQ2407EntityQ364EntityGNU Compiler CollectionEntityTexas InstrumentsEntitynumber signEntityArm HoldingsCompanyCrayPublic companyVisual C++EntityrecordEntityC preprocessorEntityRenesas ElectronicsCompanyQ864915EntityinodeEntityC++BuilderEntityC++20EntityIntel C++ CompilerEntityTiny C CompilerEntityWatcom C/C++ compilerEntity#include guardEntityCategoriesC++C (programming language) headersRestricted titles (leading number sign)