32. Rotate Right in a 32-bit Register

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

uint32_t rotate_right(uint32_t reg, uint8_t n) {
    uint32_t mask = (1U<<n) - 1;
    uint32_t new_reg = (mask & reg);
    reg =  reg>>n;
    new_reg = (new_reg << (32-n));
    reg |= new_reg;
    return reg;
}

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