题解 | #进制转换#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String hexStr = scanner.nextLine();
        hexStr = hexStr.substring(2);//删除头两个字符0x不经过转换
        int decimalNum = Integer.parseInt(hexStr, 16);//调用parseInt进行进制转换
        System.out.println(decimalNum);
    }
}