define 函數定義注意

代碼

#include        <errno.h>#include        <math.h>#include        <stdio.h>#include        <stdlib.h>#include        <string.h>#define ADD(x, y) x + y#define MUL(x, y) x * y/* * ===  FUNCTION  ====================================================================== *         Name:  main *  Description:  main function * ===================================================================================== */        intmain ( int argc, char *argv[] ){   int a= 2, b = 3;   printf ("\nProgram %d\n\n", MUL(ADD(a, b), 5) );  //被轉換成2 + 3 * 5 注意 沒有括弧 故結果為17   return EXIT_SUCCESS;}               /* ----------  end of function main  ---------- */

 

output:

 program 17

完