31. Rotate Left in an 8-bit Register

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

uint8_t rotate_left(uint8_t reg, uint8_t n) {
    // Your code here
    n %= 8;
    for (int i = 0; i < n; ++i) {
        if (reg & 0x80) {
            reg <<= 1;
            reg |= 1;
        } else {
            reg <<= 1;
        }
    }
    return reg;
}

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