#include <stdio.h>

int main() 
{
int num1,num2,num3,sum;
float avg;
printf("enter 3 numbers:");
scanf("%d %d %d",&num1,&num2,&num3);
sum=num1+num2+num3;
avg=(float)sum/3;
printf("sum=%d\n",sum);
printf("average=%f\n",avg);
}