Rotate Right in a 32-bit Register

Code

#include <stdio.h>
#include <stdint.h>

uint32_t rotate_right(uint32_t reg, uint8_t n) {
    // set the modulus op to optimize rotations for 32 iterations
    const uint8_t reg_size = sizeof(reg) * 8; // 8 bits per byte
    n %= reg_size;

    // right shift, left shift and OR to get final val
    reg = (reg >> n) | (reg << (reg_size - n));

    return reg;
}

int main() {
    uint32_t reg;
    uint8_t n;
    scanf("%u %hhu", &reg, &n);
    printf("%u", rotate_right(reg, n));
    return 0;
}

Solving Approach