How to use macro in C

Definition

Example

Text Box

/*

* =====================================================================================

*

* Filename: macro.c

*

* Description: Test macro

*

* Version: 1.0

* Created: 01/08/2013 01:19:17 PM

* Revision: none

* Compiler: gcc

*

* Author: quyendv

* Company: dovanquyen.vn@gmail.com

*

* =====================================================================================

*/

#include <stdio.h>

#define FOR_ALL_HELLO(i)\

for(i = 1; i <= num_of_loop(); i++)\

{ \

#define FOR_ALL_HELLO_END(i)}

int num_of_loop()

{

int n = 3;

return n;

}

int main()

{

int i = 0;

FOR_ALL_HELLO(i);

printf("I love you \n");

FOR_ALL_HELLO_END(i);

FOR_ALL_HELLO(i);

printf("I hate you \n");

FOR_ALL_HELLO_END(i);

return 0;

}

Result