printf 参数传递顺序是从右至左

最新推荐文章于 2021-10-26 07:28:02 发布

原创最新推荐文章于 2021-10-26 07:28:02 发布 · 1.4k 阅读

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本文通过一个简单的C语言程序示例，展示了printf函数参数的实际传递顺序为从右到左的特点，并解释了这一现象的原因。

int main()
{
   int buf [10] = {1,2,3,4,5,6,7,8,9,10};
   int current=0;

   printf("first byte is %d, second byte is %d \n",buf[current++], buf[current++]);
   printf("third byte is %d, fourth byte is %d \n",buf[current++], buf[current++]);

   /**
   * attentions !!!!
   * the result we want is :
   *   first byte is 1, second byte is 2
   *   third byte is 3, fourth byte is 4
   * but actually , the output is like this :
   *   first byte is 2, second byte is 1
   *   third byte is 4, fourth byte is 3
   * so the sequence(pushed into stack) of the
   * parameters of printf is from right to left .
   **/
}