结果输出使用+连接,但是输出的却是2个结果的和,而不是分别输出结果
public class HelloWorld{
public static void main(String[] args) {
int one = 10 ;
int two = 20 ;
int three = 0 ;
int three1=one+two;
int four=one-two;
System.out.println(three1+four);