Convert Binary String to Integer Without strtol function or Libraries

Code

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

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

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

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

Solving Approach