C - 如何显示合并排序的时间性能

Question

显示了C编程中合并排序算法的时间性能分析如何打印合并排序算法 C 编程中的时间性能（以毫秒为单位）。合并排序时间复杂度为（n log n）是条件在最坏情况还是最佳情况下。有人可以帮助我解决问题。谢谢，有人解决了我的问题。

#include<stdio.h>
#define MAX 50
void mergeSort(int arr[],int low,int mid,int high);
void partition(int arr[],int low,int high);
int main(){
    int merge[MAX],i,n;
    printf("Enter the total number of elements: ");
    scanf("%d",&n);
    printf("Enter the elements which to be sort: ");
    for(i=0;i<n;i++){
         scanf("%d",&merge[i]);
    }
    partition(merge,0,n-1);
    printf("After merge sorting elements are: ");
    for(i=0;i<n;i++){
         printf("%d ",merge[i]);
    }
   return 0;
}
void partition(int arr[],int low,int high){
    int mid;
    if(low<high){
         mid=(low+high)/2;
         partition(arr,low,mid);
         partition(arr,mid+1,high);
         mergeSort(arr,low,mid,high);
    }
}
void mergeSort(int arr[],int low,int mid,int high){
    int i,m,k,l,temp[MAX];
    l=low;
    i=low;
    m=mid+1;
    while((l<=mid)&&(m<=high)){
         if(arr[l]<=arr[m]){
             temp[i]=arr[l];
             l++;
         }
         else{
             temp[i]=arr[m];
             m++;
         }
         i++;
    }
    if(l>mid){
         for(k=m;k<=high;k++){
             temp[i]=arr[k];
             i++;
         }
    }
    else{
         for(k=l;k<=mid;k++){
             temp[i]=arr[k];
             i++;
         }
    }
    for(k=low;k<=high;k++){
         arr[k]=temp[k];
    }
}

Answer 1

include <time.h> 
include <stdio.h>
int main(){
    clock_t start = clock(); // Execuatable code
    clock_t stop = clock();
    double elapsed = (double)(stop - start) * 1000.0 / CLOCKS_PER_SEC;
    printf("Time elapsed in ms: %f", elapsed);
}