what is the difference between macro and inline function in c?
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The basic difference between inline and macro is that an inline functions are parsed by the compiler whereas, the macros in a program are expanded by preprocessor. ... The compiler may not inline and expand all the functions defined inside a class. On the other hand, macros are always expanded.
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A void function does not return a value to its caller. Functions are subprograms that do not execute until they are called. Value returning functions are used when only one result is returned and that result is used directly in an expression.
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The default return type for c language function is integer.so your fuction is taken by the compiler as returning and integer and about the void main() you cannot return a value form a function which is having a void type that's why you compiler is showing warning and is ignoring the return statement of your main.
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const and #define both are used for handle constants in source code, but they few differences. #define is used to define some values with a name (string), this defined string is known as Macro definition in C, C++ while const is a keyword or used to make the value of an identifier (that is constant) constant.
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Why is scanf faster than cin? On a high level both of them are wrappers over theread() system call, just syntactic sugar. The only visible difference is that scanf() has to explicitly declare the input type, whereas cin has the redirection operation overloaded using templates.
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A constant variable requires a storage location, a #define macro does not. A constant variable is still technically a variable so it will take memory storage space, whereas a #defined constant will not.
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The main difference between VBA and Macro is that VBA is the programming language to create Macros while Macros are programming codes that run on Excel environment to perform automatic routine tasks. ... It is possible to use VBA to create Macros. In brief, the user can automate tasks by creating Macros written using VBA.
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Macro: a word defined by the #define preprocessor directive that evaluates to some other expression. Preprocessor directive: a special #-keyword, recognized by the preprocessor. preprocessor modifies the source file before handing it over the compiler. Consider preprocessor as a program that runs before compiler.
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print() is standard library function not printf(). Major difference between print() and printf() with respect to c Programming language is, printf is library function defined in stdio. h used to display the data on output console , whereas print is not standard library function in C language.
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So the third line “int begin” is replaced by “int main” by the preprocessor before the program is passed on for the compiler. That's it… So actually C program can never run without a main() . We are just disguising the main() with the preprocessor, but actually there exists a hidden main function in the program.
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Difference between void main and int main in C/C++ It also takes arguments, and returns some value. ... The void main() indicates that the main() function will not return any value, but the int main() indicates that the main() can return integer type data.
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To the compiler, there is no difference between the two declarations. ... For example, both of the following statements declare only one pointer. int* ptr, foo, bar; int *ptr, foo, bar; This statement declares multiple pointers, which prevents using the "int*" spacing.
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['fflush function <stdio. h>', 'fopen function <stdio. h>', 'freopen function <stdio. h>']
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['Syntax. The syntax for the fseek function in the C Language is: int fseek(FILE *stream, long int offset, int whence); ... ', 'Returns. ... ', 'Required Header. ... ', 'Applies To. ... ', 'Similar Functions. ... ', 'See Also.']
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4 Answers. Macros are handled by the pre-processor - the pre-processor does text replacement in your source file, replacing all occurances of 'A' with the literal 8. Constants are handled by the compiler. They have the added benefit of type safety.
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Function is to be run at runtime (or inlined), sizeof has to be determined at compile-time. Because: when you pass a value to a function, the size of the object is not passed to the function, so a sizeof "function" would have no way of determining the size.
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The C library Macro NULL is the value of a null pointer constant. It may be defined as ((void*)0), 0 or 0L depending on the compiler vendor.