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
    while (n--) {
        uint8_t mask = 1 << 7;
        uint8_t to_flash = (mask & reg) >> 7;
        reg <<= 1;
        reg = reg | to_flash;
    }
    return reg;
}

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