31. Rotate Left in an 8-bit Register

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


uint8_t rotate_left(uint8_t reg, uint8_t n) {

    n = n % 8;  // handle rotations > 8

    return (reg << n) | (reg >> (8 - n));
}

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