Code for Binary search in C not working properly

Question

I can't fix the logical error because I don't know what is wrong in this code. Every input, it shows "element not found". I would really appreciate it if someone can help me in this. Also in this code, I have assumed we'll be taking the size of the array as an odd number, what to do if we decide to take an even number as size?

#include<stdio.h>
int main(){
  int size;
  printf("Enter the number of elemets(odd number) : ");
  scanf("%d",&size);
  int arr[size];
  printf("Enter the elements in ascending order : ");
  for(int i=0;i<size;i++){
    scanf("%d",&arr[i]);
  }
  int element;
  int flag=0;
  printf("Enter element to be found : ");
  scanf("%d",&element);
  int low=0;
  int high=size-1;
  while(low<high){
    int mid=(low+high)/2;

    if(element<arr[mid]){
      high=mid-1;
    }
    else if(element>arr[mid]){
      low=mid+1;
    }
    else if(element==arr[mid]){
      printf("Element %d found at pos %d ",element,mid);
      flag=1;
      break;
    }
  }
  if(flag==0){
    printf("Element not found");
  }

  return 0;
}

Answer 1

EDIT: Refer to the better answer by @TomKarzes

My old answer is:

You missed a boundary case of high==low

#include<stdio.h>
int main(){
  int size;
  printf("Enter the number of elements(odd number) : ");
  scanf("%d",&size);
  int arr[size];
  printf("Enter the elements in ascending order : ");
  for(int i=0;i<size;i++){
    scanf("%d",&arr[i]);
  }
  int element;
  int flag=0;
  printf("Enter element to be found : ");
  scanf("%d",&element);
  int low=0;
  int high=size-1;
  while(low<high){
    int mid=(low+high)/2;

    if(element<arr[mid]){
      high=mid-1;
    }
    else if(element>arr[mid]){
      low=mid+1;
    }
    else if(element==arr[mid]){
      printf("Element %d found at pos %d ",element,mid);
      flag=1;
      break;
    }
  }
  if(low==high && arr[low]==element) //Added 1 extra condition check that you missed
  {
    printf("Element %d found at pos %d ",element,low);
    flag=1;
  }
  if(flag==0){
    printf("Element not found");
  }

  return 0;
}