31. Rotate Left in an 8-bit Register

#include <stdio.h>
#include <stdint.h>
/* ANOTHER METHOD
uint8_t rotate_left(uint8_t reg, uint8_t n) {
    // Mask to ensure rotation within 8 bits
    n %= 8;

    // Perform circular left rotation
    return (reg << n) | (reg >> (8 - n));
}
*/

uint8_t rotate_left(uint8_t reg, uint8_t n) {
    uint8_t bit = 0;
    for(int i=1 ; i<=n ; i++){
        bit = (reg >> 7) & 1U;
        reg = reg << 1 | bit;
    }

    return reg;
}

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