Performs an arithmetic left shift on a bit pattern.

对位模式执行数学左移位。

The use of masks, and the right and left shift operators, come in handy here.

在这里使用掩码、右移和左移运算符很方便。

The game operate : pass game. the cursor key " " mean to left shift move, " " mean that move rightwards. there is certain difficulty.

游戏操作：过关游戏。光标键「 」表示向左移动， 「 」表示向右移动。有一定的难度。

In an arithmetic left shift, the bits shifted beyond the range of the result data type are discarded, and the bit positions vacated on the right are set to zero.

在算术左移位中，位元移动的范围若超过结果资料型别会予以舍弃，而且右方空出的位元位置会设定成零。

This will always be the number of bytes it needs to shift left to move the address specified to the beginning of the register.

这将总会是它为了将指定地址移到寄存器的开始所需向左移位的字节数。