#include <stdio.h>

void main() 
{
	int i1, i2, i3;
	i3 = 1;
	while ( i3 != 0 )
	{
		printf("Birinci sayiyi gir: "    ); 
		scanf("%d",&i1);
		printf("Ikinci sayiyi gir: "     ); 
		scanf("%d",&i2);
		printf("Islem gir(1=+,2=-,3=*): "); 
		scanf("%d",&i3);
		printf("%d %d %d\n",i1,i2,i3);
		switch (i3)
		{
			case 1 : {printf("%d\n",(i1 + i2));
						 break;}
			case 2 : {printf("%d\n",(i1 - i2));
						 break;}
			case 3 : {printf("%d\n",(i1 * i2));
						 break;}
			case 0 : 		 
				  		 break;
			default: printf("HATA\n");
		}

	}
}