C/C++宏定义交换两个值

Posted 2021-02-01 朱小勇

#define SWAP(t,a,b)           do{                           t c = a;                      \    
a = b;                        b = c;                        }while(0);     



void main()
{
    int a=1,b=2;
    SWAP(int,a,b);  
}