Convert Binary String to Integer Without strtol function or Libraries

Code

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

uint16_t binary_to_uint(const char *str) {
    // Your logic here
    uint16_t res = 0;
    int i = 0;
    while(str[i] != '\0')
    {
        res <<= 1;
        if(str[i] == '1')
        {
            res |= 1U;
        }
        i++;
    }
    return res;
}

int main() {
    char bin[20];
    scanf("%s", bin);

    printf("%u", binary_to_uint(bin));
    return 0;
}

Solving Approach