C program for bubble sort

#include <stdio.h>
#include <stdlib.h>
int bubble_sort(int,int[]);    // function prototype
int main()
{ 
  int n;
  int arr[100];
  printf("\n This is a simple program for bubble sort\n");

  printf("\n Enter the size of array you want\n");
  scanf("%d",&n);     // taking input as length of array
  
  printf("\n Now Enter the elements of array\n");
  for(int i=0;i<n;i++)
  scanf("%d",&arr[i]);   // taking input as elements of array

  printf("Array elements entered by you is:\n ");
  for(int i=0;i<n;i++)
  printf("%d\t",arr[i]);  // printing entered array

  printf("\n\n Array elements after sorting :\n");
  bubble_sort(n,arr);  // function call
  printf("\n Sorted array elements after bubble sort");
  return 0;
}

int bubble_sort(int n,int arr[])   // function definition
{
  int temp;
  for (int j=0;j<n-1;j++)         // outer loop
    {
      for (int i=0;i<n-j-1;i++)   // inner loop
         {
           if(arr[i]>arr[i+1])
              {
               temp=arr[i+1];
               arr[i+1]=arr[i];
               arr[i]=temp;
              }
         }
    }

  for (int j=0;j<n;j++)   // displaying final array
  printf("%d \t",arr[j]);
  return 0;
}