在C中移位(bit shifting in C) int x = 2; x = rotateInt('L', x, 1); // should return 4 x = rotateInt('R', x, 3); // should return 64

这里是代码，有人可以检查它，让我知道错误是什么？

编译是成功的，但是当我执行它时，它说Segmentation Fault 。

int rotateInt(char direction, unsigned int x, int y) { int i; for(i = 0; i < y; i++) { if(direction == 'R') { if((x & 1) == 1) { x = x >> 1; x = (x ^ 128); } else x = x >> 1; } else if(direction == 'L') { if((x & 128) == 1) { x = x << 1; x = (x ^ 1); } else x = x << 1; } } return x; } int x = 2; x = rotateInt('L', x, 1); // should return 4 x = rotateInt('R', x, 3); // should return 64

Here is the code, can someone check it and let me know what the error is?

Compilation is successful, but it says Segmentation Fault when I execute it.

int rotateInt(char direction, unsigned int x, int y) { int i; for(i = 0; i < y; i++) { if(direction == 'R') { if((x & 1) == 1) { x = x >> 1; x = (x ^ 128); } else x = x >> 1; } else if(direction == 'L') { if((x & 128) == 1) { x = x << 1; x = (x ^ 1); } else x = x << 1; } } return x; }

最满意答案

我试图在我的电脑上（MacBookPro / Core2Duo），它的工作。 顺便说一句，你的目标架构是什么？ 当您使用C运算符“>>”和“<<”时，一些（许多）处理器执行旋转而不是轮班。

I tried on my computer (MacBookPro / Core2Duo) and it worked. By the way, what's your target architecture ? Some (many) processors perform rotation instead of shifts when you use the C operators ">>" and "<<".

在C中移位(bit shifting in C) int x = 2; x = rotateInt('L', x, 1); // should return 4 x = rotateInt('R', x, 3); // should return 64

这里是代码，有人可以检查它，让我知道错误是什么？

编译是成功的，但是当我执行它时，它说Segmentation Fault 。

int rotateInt(char direction, unsigned int x, int y) { int i; for(i = 0; i < y; i++) { if(direction == 'R') { if((x & 1) == 1) { x = x >> 1; x = (x ^ 128); } else x = x >> 1; } else if(direction == 'L') { if((x & 128) == 1) { x = x << 1; x = (x ^ 1); } else x = x << 1; } } return x; } int x = 2; x = rotateInt('L', x, 1); // should return 4 x = rotateInt('R', x, 3); // should return 64

Here is the code, can someone check it and let me know what the error is?

Compilation is successful, but it says Segmentation Fault when I execute it.

int rotateInt(char direction, unsigned int x, int y) { int i; for(i = 0; i < y; i++) { if(direction == 'R') { if((x & 1) == 1) { x = x >> 1; x = (x ^ 128); } else x = x >> 1; } else if(direction == 'L') { if((x & 128) == 1) { x = x << 1; x = (x ^ 1); } else x = x << 1; } } return x; }

最满意答案

我试图在我的电脑上（MacBookPro / Core2Duo），它的工作。 顺便说一句，你的目标架构是什么？ 当您使用C运算符“>>”和“<<”时，一些（许多）处理器执行旋转而不是轮班。

I tried on my computer (MacBookPro / Core2Duo) and it worked. By the way, what's your target architecture ? Some (many) processors perform rotation instead of shifts when you use the C operators ">>" and "<<".