位运算实现两个数相加

JavaScript实现

        function add(num1,num2){
            var sum1=num1^num2;//忽略进位，异或
            var sum2=(num1&num2)<<1;//与，移位，进位运算
            sum=sum1+sum2;//相加
            return sum;
        }
        console.log(add(12,18));//30

Java实现，控制台输入数据

import java.util.Scanner;


public class add {
    static int sum=0;
    public static int test(int a,int b){
        int sum1=a^b;
        int sum2=(a&b)<<1;
        sum=sum1+sum2;
        return sum;
    }
    
    public static void main(String[] args){
        Scanner con=new Scanner(System.in);
        int a=con.nextInt();
        int b=con.nextInt();
        
        System.out.print(test(a,b));
    }
}