C Preprocessor DirectivesThere are following preprocessor directives in C programming language,Preprocessor DirectivesDescription #define To define a preprocessor macro. #include To include the code from another file or to include header file in the current code. #undef To undefine a defined ...
The $ifndef directive usually checks/helps in seeing the specific identifier is currently not defined or not. The #ifndef preprocessor of the C Programming Language helps in allowing the conditional compilations. The preprocessor directive helps in determining whether the macro is existed or not before...
While working with preprocessor directives in a large C program one can declare conditional statements for executing some statements using #ifdef or #if or #ifndef directives. Thus #else directive here provides the block to be executed when the condition given in above block results to false. Rec...
Macros are preprocessor directives allowing for text substitution in code and are typically used for creating shorthand notations or code generation. However, there are a few shortcomings of preprocessor macros that tip the scales in favor of inline functions in C++. These are: Macros can not ...
Explanation:The preprocessor directives can be redefined anywhere in the program. So the most recently assigned value will be taken. C aptitude 28.3 main() { printf("%p",main); } Answer:Some address will be printed. Explanation:Function names are just addresses (just like array names are addr...
Thus, in the insertion sort technique, we start from the second element as we assume that the first element is always sorted. Then from the second element to the last element, we compare each element to all of its previous elements and the put that element in the proper position. ...
C# Preprocessor Directives C# has the following preprocessor directives: #if #else #elif #endif #define #undef #warning #error #line #region #endregion #pragma #pragma warning #pragma checksum Learn More: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives/ ...
cout<<"(a-b) greater than/equal to (d-c)"<<endl; } Output: a is not equal to b c is not equal to d (a+b) less than/equal to (c+d) (a-b) greater than/equal to (d-c) In the above program, we see the usage of relational operators and the way in which they evaluate...
3.Prevent removal of comments using -C Suppose your code is like : #include<stdio.h> int main(void) { printf("\n Hello World \n"); return 0; //return from main } In a normal compilation, the comment above would be removed. But if -C option is used with cc compiler then the ...
//Wrapper to access the preprocessor directive value #include "Area.hpp" double getPI(){ //Wrapper function retrieves the value of PI return PI; } Generate the library definition in an interface named Area. clibgen.generateLibraryDefinition( ... ["Area.hpp","WrapperPI.hpp"], ... Interf...