C program to sort list of numbers using pass by reference

#include<stdio.h>
#include<conio.h>
void sort(int n, int* ptr)
{
    int i, j, t;
    for (i = 0; i < n; i++) {
  
        for (j = i + 1; j < n; j++) {
  
            if (*(ptr + j) < *(ptr + i)) {
  
                t = *(ptr + i);
                *(ptr + i) = *(ptr + j);
                *(ptr + j) = t;
            }
        }
    }
  for (i = 0; i < n; i++)
        printf("%d ", *(ptr + i));
}
void main()
{
    int n = 7;
    int arr[] = { 0, 20, 17, 32, 7, 19, 77 };
    sort(n, arr);
    getch();
}