package a;
import java.util.*;
public class YiChang {
public static void main(String[] args) {
System.out.println("输入整数:");
try
{
Scanner a=new Scanner(System.in);
int b=a.nextInt();
}
catch (Exception e)
{
e.printStackTrace();
System.out.println("输入有误!"+e.getMessage());
}
}
}