WebAug 8, 2024 · ในบทความนี้. The Microsoft C/C++ compiler (MSVC) predefines certain preprocessor macros, depending on the language (C or C++), the compilation target, and the chosen compiler options. MSVC supports the predefined preprocessor macros required by the ANSI/ISO C99, C11, and C17 standards, and the ISO C++14, C++17, and C++20 ... WebFor xlclang/xlclang++, see Table 2. You can use the -qshowmacros=pre -E compiler options to view the values of the predefined macros. You can use -qshowmacros -E on an empty source file to view the values of the predefined macros. Table 1. Compiler-related predefined macros for xlc/xlC and equivalent special invocations.
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WebAug 2, 2024 · Remarks. A typical use of the message pragma is to display informational messages at compile time. The message-string parameter can be a macro that expands to a string literal, and you can concatenate such macros with string literals in any combination. If you use a predefined macro in the message pragma, the macro should return a string. WebNov 14, 2024 · Predefined Macros# Several object-like macros are predefined; you use them without supplying their definitions. They fall into three classes: standard, common, and system-specific. In C++, there is a fourth category, the named operators. They act like predefined macros, but you cannot undefine them. newstip globe.com
Macros in C Types and Examples - Scaler Topics
WebThese pages lists various pre-defined compiler macros that can be used to identify standards, compilers, operating systems, hardware architectures, and even basic run-time libraries at compile-time. For example, if we want to use a generic or opaque pointer type, we use void pointers. However, ancient K&R compilers (from the time before the ... WebJan 10, 2024 · Macro in C programming is known as the piece of code defined with the help of the #define directive. Macros in C are very useful at multiple places to replace the piece of code with a single value of the macro. Macros have multiple types and there are some predefined macros as well. Scope of Article WebThe Arm Compiler predefines a number of macros. These macros provide information about toolchain version numbers and compiler options. In general, the predefined macros generated by the compiler are compatible with those generated by GCC. See the GCC documentation for more information. The following table lists Arm-specific macro names ... midmark ritter 222 power exam table