C Program to Minimize the maximum difference between heights

Code in C

#include <stdio.h>
 
int min(int a, int b){
    if(a>b)
        return b;
    return a;
}

int max(int a, int b){
    if(a<b)
        return b;
    return a;
}

int getMinDiff(int arr[], int n, int k)
{
    //Sort the array
    for(int i=0; i<n; i++){
        for(int j=i+1; j<n; j++){ if(arr[i]>arr[j]){
                int temp = arr[i];
                arr[i] = arr[j];
                arr[j] = temp;
            }
        }
    }

    int ans = arr[n - 1] - arr[0]; 
 
    int tempmin, tempmax;
    tempmin = arr[0];
    tempmax = arr[n - 1];
 
    for (int i = 1; i < n; i++) {
        tempmin= min(arr[0] + k,arr[i] - k); 
        tempmax = max(arr[i - 1] + k, arr[n - 1] - k); 
        ans = min(ans, tempmax - tempmin);
    }
    return ans;
}
 
// Driver Code Starts
int main()
{
    int k = 6, n = 6;
    int arr[] = { 7, 4, 8, 8, 8, 9 };
    int ans = getMinDiff(arr, n, k);
    
    printf("%d", ans);
}