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 result = 0;
    uint8_t i = 0;
    while(str[i] != '\0'){
        i++;
    }
    uint8_t v = i-1;
    for(int j = 0; j < i; j++){
        uint8_t ram = str[j] - '0';
result += (1 << v) * ram; 
v--;
    }
    return result;
}

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

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

Solving Approach