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package leetcode.string;

public class ReverseNum {

public static void main(String[] args) {

int x = -12300;

System.out.println(reverseNum(x));

}

public static int reverseNum(Integer x) {

int result = 0;

while (x != 0) {

// 因为都是用int型的，如果超出了范围，其除以10的结果就不会跟之前的结果一致，通过这点也可以进行区分

int tmp = result * 10 + x % 10;

if (tmp / 10 != result) {

return 0;

}

result = tmp;

x = x / 10;

}

return result;

}

}