square (매크로 함수, inline 함수)

<main.c>

#include <stdio.h>

#include "square.h"



#define SQUARE(num) (num) * (num)



/*

int square(int num)

{

	return num * num;

}

*/



int main(void)

{

	//int result = square(5);

	//int result = SQUARE(5);               // int result = (5) * (5);

	

	int i = 5;

	int result = square(i++);

	//int result = SQUARE(i++);               // int result = (i++) * (i++);

	

	printf("result : %d\n", result);

	

	return 0;

}

<square.h>

#ifndef SQUARE_H

#define SQUARE_H





extern inline int square(int num)

{

	return num * num;

}



#endif

 

<compile 결과>