基本计算"Multiple markers on this line syntax error, delete this token"

Question

你好，我刚刚开始学习java，在一些非常基本的计算上遇到了麻烦。这个简单的程序要求用户输入两个值，然后当它运行时，我希望它显示"20 + 5 = 25"。然而，我在"+" num2 "=" num1行的这部分反复收到"语法错误，删除此令牌"消息。怎么了?

package ner.cs1451;
import java.util.Scanner;
public class Project01a {
/*This program asks the user to input two values
 *Then computes the following: sum, difference, product, quotient, remainder, and the average.*/
    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);

        System.out.print("Enter the first number: ");
        int num1 = in.nextInt();
        System.out.print("Enter second number: ");
        int num2 = in.nextInt();
        int avg = (num1 + num2)/2;

        System.out.println(num1 "+" num2 "=" num1 + num2);
        System.out.println(num1 "-" num2 "=" num1 - num2);
        System.out.println(num1 "*" num2 "=" num1 * num2);
        System.out.println(num1 "/" num2 "=" num1 / num2);
        System.out.println(num1 "%" num2 "=" num1 % num2);
        System.out.println("The average of your two numbers is: "+avg);

Answer 1

像这样连接字符串:

System.out.println(num1 + "+" + num2 + "=" + (num1 + num2));

Answer 2

您正在尝试连接的所有值之间缺少连接操作符+。例如

System.out.println(num1 + "+" + num2 + "=" + (num1 + num2));

您还需要将加法用圆括号括起来，以便在数字之间进行正常的加法，而不是连接。