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 len = 0;
    int digit = 0;
    while (str[len] != '\0') ++len;

    // len = len;
    int i = 0;
    while (str[i] != '\0'){
        digit += (str[i] == '0') ? 0 : (1 << (len - 1));

        --len; ++i;
    }
    return digit;
}

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

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