【原创】C语言逗号表达式

【原创】C语言逗号表达式

    在C语言中，多个表达式可以用逗号分开，其中用逗号分开的表达式的值分别结算，整个表达式的值是最后一个表达式的值。

    示例代码：
int main(int argc, char* argv[])
{
	int i, j;
	i = (10-2, 3*4);
	j = 10-2, 3*4;

	printf("i = %d\n",i);
	printf("j = %d\n",j);

	return 0;
}
/* 输出结果
i = 12
j = 8
*/
      猜一下下面代码结果是怎样的：

int main(int argc, char* argv[])
{
	int i, j, k;
	i = 0, j = 1, k = 2;
	
	printf("i = %d, j = %d, k = %d\n", i, j, k);
	
	i = (j++, k++);
	printf("i = %d, j = %d, k = %d\n", i, j, k);
	
	while (i = (rand()%100), i != 60)
	{ 
		printf("i is %d, tring again...\n", i);
	}
	
	printf("\nGuess what? i is %d!\n", i);
	return 0;
}

/*输出结果
i = 0, j = 1, k = 2
i = 2, j = 2, k = 3
i is 41, tring again...
i is 67, tring again...
i is 34, tring again...
i is 0, tring again...
i is 69, tring again...
i is 24, tring again...
i is 78, tring again...
i is 58, tring again...

Guess what? i is 50!
*/