#include<stdio.h>
int main(){

	int x,i=0,sum=0;
	int largest=0, smallest=100;

	do{
		i=i+1;
		do{
			printf("number %d = ",i);
			scanf("%d",&x);
			if(x<0)
				printf("positive number only. please re-enter.\n");
		}while(x<0);
		
		if(x!=0)
		{
			sum=sum+x;
			
			if(x>largest)
				largest=x;
			if(x<smallest)
				smallest=x;
		}
	}while(x!=0);
		if(x==0)
			i=i-1;
			printf("count= %d\n",i);
			
			printf("sum= %d\n",sum); 

			printf("average= %.2f\n", sum/i);
			
			printf("largest= %d\n",largest);

			printf("samllest= %d\n", smallest);

	return 0;
}