question28.java

public class question28 {
    public static int myAtoi(String sc) {
        if (sc == null || sc.length() == 0) return 0;

        sc = sc.trim();
        if (sc.length() == 0) return 0;

        int sign = 1, i = 0;
        long result = 0;

        if (sc.charAt(i) == '+' || sc.charAt(i) == '-') {
            sign = (sc.charAt(i) == '-') ? -1 : 1;
            i++;
        }
        while (i < sc.length() && Character.isDigit(sc.charAt(i))) {
            result = result * 10 + (sc.charAt(i) - '0');

            if (sign * result > Integer.MAX_VALUE) return Integer.MAX_VALUE;
            if (sign * result < Integer.MIN_VALUE) return Integer.MIN_VALUE;

            i++;
        }

        return (int)(sign * result);
    }

    public static void main(String[] args) {
        String input = "-24";
        System.out.println("Converted Integer: " + myAtoi(input));
    }
}