改写sort函数，使其执行按大到小排列

#include<iostream>#include<algorithm>using namespace std;int cmp(int a,int b){    return a>b;}int main(){    int arr[10]={2,4,6,12,3,6,2,3,6,8};    sort(arr,arr+10,cmp);    for(int i=0;i<10;i++)        cout<<arr[i]<<" "; }