average and median.c

#include<stdio.h>
#include<stdlib.h>
int compare(const void *a, const void *b) {
    double diff = (*(double*)a - *(double*)b);
    if (diff < 0) return -1;
    if (diff > 0) return 1;
    return 0;
}


int main()
{
    printf("NOTE:Give // when you finish giving the inputs\nFUNCTION FOR COUNTING AVERAGE\n\n\nENTER:");
    int capacity;double *arr=(double*)malloc(capacity*sizeof(double));
    int count=0;
    double input;
    capacity=2;
    while(scanf("%lf",&input)==1)
    {
        if(capacity==count)
        {
            arr=(double*)realloc(arr,capacity*2*sizeof(double));
        }
        arr[count]=input;
        count++;}
        int i; double sum=0;

for(i=0;i<count;i++)
{sum+=arr[i];
}
double avg=sum/count;
printf("SUM= %.2lf\nAVERAGE= %.2lf",sum,avg);
qsort(arr,count,sizeof(double),compare);
double med;
if (count%2!=0)
{
    med=arr[(count/2)];
}
else
{
    med=(arr[count/2]+arr[(count/2)-1])/2;
}
printf("\nMEDIAN: %.2lf",med);
free (arr);


}