import java.util.Scanner;
public class Test1108Swap{
public static void main(String[] args){
Scanner sca = new Scanner(System.in);
System.out.println(“请输入a：”);
int a = sca.nextInt();
System.out.println(“请输入b：”);
int b = sca.nextInt();
int tmp;
System.out.println(“交换前的a为”+a+" 交换前的b为"+b);
tmp=a;
a=b;
b=tmp;
System.out.println(“交换后的a为”+a+" 交换后的b为"+b);
}
}
