public class Test1 {
//1，两个变量里的数字进行交换，不依赖第三个变量
int a ;
int b;
public void swap(int a ,int b){
a = a + b;
b = a - b;
a = a - b;
System.out.println("交换后"+"a:"+a+",b:"+b);
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
Test1 t1= new Test1();
System.out.println("请输入两个数:");
t1.swap(scanner.nextInt(), scanner.nextInt());
}
}
