 Related Questions The register modifier hints to the compiler that the variable will be heavily used and should be kept in the CPU’s registers, if possible, so that it can be accessed faster. There are several restrictions Latest Answer : If a variable is defined by using register modifier it tells to the compiler that the variable is used repetedly and that variable executes fastly. Generally register variables are defined in loop counters. This variable stored in CPU registers and access ... The volatile modifier is a directive to the compiler’s optimizer that operations involving this variable should not be optimized in certain ways. There are two special cases in which use of the A global variable that must be accessed from more than one file can and should be declared in a header file. In addition, such a variable must be defined in one source file. Variables should not be defined Latest Answer : A variable can be declare/define in a C Header without any kind of compilational/ logical errors. But it is against the coding specifications and it is not normally practiced. If proper Multiple inclusion protection macro is used, then there will be no ... A macro is a preprocessor directive that provides a mechanism for token replacement in your source code. Macros are created by using the #define statement. Here is an example of a macro: Macros Latest Answer : Short name for long name/string/expersion is called macro. ... The C preprocessor is used to modify your program according to the preprocessor directives in your source code. A preprocessor directive is a statement (such as #define) that gives the preprocessor specific One easy technique to avoid multiple inclusions of the same header is to use the #ifndef and #define preprocessor directives. When you create a header for your program, you can #define a symbolic name The #pragma preprocessor directive allows each compiler to implement compiler-specific features that can be turned on and off with the #pragma statement. For instance, your compiler might support a feature Latest Answer : To pack one byte aligned #pragma pack(1) ... The #line preprocessor directive is used to reset the values of the _ _LINE_ _ and _ _FILE_ _ symbols, respectively. This directive is commonly used in fourth-generation languages that generate C language Latest Answer : Dear Sir, I am a Computer Science Lecturer. Really 'C' Ques & Ans are very useful for us. Please could you send me a soft copy to my Email.I will recommand this site to my studentd. Thanking You ASHIQ MOHAMMED aashiq_md@yahoo.co.in ... You can use the #undef preprocessor directive to undefine (override) a previously defined macro. Latest Answer : The header files are used for various function used your C program like printf,scanf and various preprocessor activities during compilation. ...
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