while loop

#include<stdio.h>
int main()
{
int i,a,b,sum=o,count=0;
float avg;
scanf("%d %d",&a&b);
i=a;
while(i<=b)
{
sum=sum+i;
count++;
avg=(float)sum/count;
i++;
}
printf("sum=%d\n",sum);
printf("avg=%2f\n",avg);
}