动态转移左边或右边 [英] Dynamically shift left OR right

问题描述

我有一个pretty简单的问题。有没有办法来动态逐位向左或向右，例如移根据一个int的迹象。

I have a pretty simple question. Is there a way to dynamically shift bitwise to the left OR to the right, e.g. depending on the sign of an int.

signed int n = 3;
signed int m = -2;

int number1 = 8;
int number2 = 8;

//number1 shift n;
//number2 shift m;

在这种情况下，我想数字1 3比特2比特左移和数字2到右侧。有没有如果别人？

In this case I want to shift number1 3 bits to the left and number2 2 bits to the right. Is there a way without if else?

推荐答案

确实：算作一个的if-else ？

int x = (n > 0) ? (number1 << n) : (number1 >> (-n));
int y = (m > 0) ? (number2 << n) : (number2 >> (-m));

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