Detect Circular Pattern Match

Code

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

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    uint16_t reg_check;
    uint8_t flag;
    for (int i; i<16; i++) {
        reg_check = (reg << i) | (reg >> (16-i));
        if (target == reg_check) {
            flag = 1;
            break;
        } 
    }
    return flag;
}

int main() {
    uint16_t reg, target;
    scanf("%hu %hu", &reg, &target);
    printf("%hhu", is_circular_match(reg, target));
    return 0;
}

Solving Approach