#define函数

不复习很快就忘了。注意最好要加括号啊！

#include<stdlib.h>

#include <stdio.h>

#include<string.h>

 

 

//#define x264_COPY2(x,y,a,b)  if((x)<(y)) {x=y;a=b;}

#define x264_COPY2(x,y,a,b)  if((x)<(y)) {x=y;a=b;}//最好是

#define x264_COPY2(x,y,a,b)  if((x)<(y)) {(x)=(y);(a)=(b);}

int main()

{

int a=0;

int b=88;

int aa=0;

int bb=1;

x264_COPY2(aa,bb,a,b);

printf("aa=%d,bb=%d,a=%d,b=%d",aa,bb,a,b);

return 0;

}