118. Convert Binary String to Integer Without strtol function or Libraries

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

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

    return value;
}

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

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