sort内置排序函数

#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <math.h>
#include <sstream>
#include <vector>
#include <stack>
#include <map>
#include <queue>
#include <iostream>
#include <stdlib.h>
#define rep(i,s,e) for(int i = (s);i<=(e);++i)
#define maxn 100000
#define INF 1000000000
using namespace std;

int main()
{
    int num[] = {1,3,5,4,8,2,3,9};
    sort(num,num+8,less<int>());
    //sort(num,num+8,greater<int>());
    for(int i = 0;i<8;++i)
    printf("%d\n",num[i]);
}