# (stringizing) and ##(merging) operator

#include <stdio.h>

// reference "多型與虛擬" p.184~185 (author 侯捷)

// # (stringizing operator): 將巨集參數轉換為字串常數

#define stringer(x) printf(#x "\n")

// ## (merging operator or token-pasting operator): 把兩個 token 合併成一個 token 再交由編譯器去 parsing

#define paster(n) printf("token" #n "=%d",token##n)

void test_stringer()

{

stringer(hello    world);

}

void test_paster()

{

int token9 = 9;

paster(9);

}

int main()

{

test_stringer();

test_paster();

}