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) {
    uint16_t result = 0;

    for (int i = 0; str[i] != '\0'; i++) {
        result <<= 1; // Shift left to make space for next bit

        if (str[i] == '1') {
            result |= 1; // Set the least significant bit
        } else if (str[i] != '0') {
            // Invalid character
            return 0; // Or handle error as needed
        }
    }

    return result;
}

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

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

Solving Approach