#include<stdio.h>
void main()
{int num,jian,cheng,zhu,a,b;
 printf("請輸入兩個數:");
 scanf("%d%d",&a,&b);
 if(a<0||b<0)
	printf("\n輸入有誤！！！\n");
 else
 {
   num=a+b;jian=a-b;cheng=a*b;zhu=a/b;    
   printf(" %d %d %d %d \n",num,jian,cheng,zhu);
 } 
}