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Are there rotate operation in c?

+1 vote
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Are there rotate operation in c?
posted May 2, 2016 by anonymous

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What is the meaning of rotation in the question?

2 Answers

+2 votes

example for unsigned 32-bit integer rotation

uint32_t val = . . . // this is the value being rotated
uint32_t num = . . .//this is the number of times the value needs to be rotated
uint32_t rol = (val << (32 - num)) | (val >> num); //left rotation
uint32_t ror = (val >> (32 - num)) | (val << num); //right rotation

answer May 3, 2016 by Lavanya L
where we use such type of rotation?
It is good practice question to get hands on bitwise operators, I'm not aware where its used
Thanks !
0 votes

Here is an example for unsigned 32-bit integers:

uint32_t val = ... // this is the value being rotated
uint32_t rol = (val << 1) | (val >> 31);
uint32_t ror = (val >> 1) | (val << 31);
answer May 2, 2016 by Rajan Paswan
Similar Questions
+2 votes

Does anyone know how to rotate a 2d matrix circularly for n times in suppose C language...? It would be a lot of help if you could explain with code.

Hint : Each time each row vector needs to be rotated one element to the right relative to the preceding row vector.

0 votes

Write a c program that rotate elements of an array by the value of configured number "n".
For example:
Input array[ ] = { 2, 3, 5, 6, 8, 9}
value of n = 2
Output array[] = { 5, 6, 8, 9, 2, 3}
I am looking for efficient program.

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