average to infinity

#include<stdio.h>
int main(){
    int num, sum=0, count=0;
    float avg;
    printf("Enter the number: ");
    scanf("%d", &num);
    while(num!=-1){
        count++;
        sum+=num;
        printf("Enter the number: ");
        scanf("%d", &num);

    }
    avg=(float)sum/count;
    printf("Average: %.2f", avg);
    return 0;
}