Although the compiler doesn't have a separate preprocessor, the directives described in this section are processed as if there were one. You use them to help in conditional compilation. Unlike C and C++ directives, you can't use these directives to create macros. A preprocessor directive must ...
Although the compiler doesn't have a separate preprocessor, the directives described in this section are processed as if there were one. You use them to help in conditional compilation. Unlike C and C++ directives, you can't use these directives to create macros. A preprocessor directive must ...
Although the compiler doesn't have a separate preprocessor, the directives described in this section are processed as if there were one. You use them to help in conditional compilation. Unlike C and C++ directives, you can't use these directives to create macros. A preprocessor directive must ...
Preprocessor directives are lines included in the code of our programs that are not program statements but directives for the preprocessor. These lines are always preceded by a hash sign (#). The preprocessor is executed before the actual compilation of code begins, therefore the preprocessor digest...
Learn about the C++ preprocessor, its directives, and how to use it effectively in your C++ programming.
preprocessor directives and regular statements in c/c++ serve different purposes. directives are used to direct the preprocessor to how to handle your source code before compilation, while regular statements are part of the actual program's logic and execution. additionally, directives are processed ...
Although the compiler doesn't have a separate preprocessor, the directives described in this section are processed as if there were one. You use them to help in conditional compilation. Unlike C and C++ directives, you can't use these directives to create macros. A preprocess...
Notice that it's useful to comment which conditional statement a particular #endif terminates. This is particularly true because preprocessor directives are rarely indented, so it can be hard to follow the flow of execution. On many compilers, the#pragma oncedirective can be used intead of includ...
The preprocessor allows you conditionally to compile sections o through the use of#ifdef,#else, and#endifdirectives. For example: #ifdef DOS #define NAME"C:\ETC\DATA" #else /* DOS */ #define NAME"/etc/data" #endif /* DOS */
Executing Dynamic SQL Statements Error Handling Preprocessor Directives Including Files Directives: ifdef, ifndef, else, elif, and endif Directives define and undef Using Library Functions SQL Descriptor Area Examples ecpg and Pro*C Compatibility Comparison ...