import java.util.Scanner;
public class Main{
public static void main(String args[]){
Scanner in= new Scanner(System.in);
int a=in.nextInt();
int b= in.nextInt();
System.out.println(a+b);
System.out.println(a-b);
System.out.println(a*b);
float c=(float)a/b;
System.out.println(c);
}
}
这个地方一定要注意除法，结果可能是小数
float c = (float)a/b;
