Are there rotate operation in c?

Question

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.

Answer 1

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

Comments

where we use such type of rotation?

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It is good practice question to get hands on bitwise operators, I'm not aware where its used

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Thanks !

Answer 2

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);