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

int myAtoi( char *s, int *error)
{
    int result = 0;
    int sign = 1;
    int i = 0;
    int j = 0;

    int decimal = 0;
    int count = 0;

    double index = 0;

for (j = 1; s[j] != '\0' ; j++){
        count = count + 1;
}
 for (i = i; s[i] != '\0' ; i++){
    while (s[i] == ' ')
        {
          i++;
        }
 ///Converting Hex
    if (s[0] == '0' && s[1] == 'x'){

            index = count - i;
            if(s[i] > '0' && s[i] <= '9'){

                decimal = decimal + (s[i] - 48) * pow(16.0,(double)index);
            }
            else if((s[i] >= 'a' && s[i] <= 'f') ){

                decimal = decimal + (s[i] - 87) * pow(16.0,(double)index);
            }
            else if((s[i] > '9' && s[i] < 'a') || (s[i] >= 'g')){
                index = count - i + 1;
                decimal = (decimal/pow(16.0,(double)index));
                return decimal;
            }
            else{
                i++;
            }
            result = decimal;

            }
///Converting Decimal
    else {
            while (s[i] == ' ' || s[i] == '0'){
            i++;
            }
            if (s[i] == '-')
            {
                sign = -1;
                i++;
            }
            for (i = i; s[i] != '\0' ; i++){

                if(s[i] > ':' || s[i] < '/'){
                   return result;}

                result = result*10 + s[i] - '0';  ///Minus '0' ascii 48 from answer to get back to decimal value
                result = sign*result;
                }
    }
 }

    return result;
}

int main()
{

    char str[] = "0x10";
    int error = '0';
    printf("%d ", myAtoi(str, &error));
    return 0;
}