sort排序

sort排序默认是从小到大排序

#include<iostream>#include<cstdio>#include<algorithm>using namespace std;int cmp(int a,int b){    return a<b;}int cmp1(int a,int b){    return a>b;}int main(){    int a[]={1,5,2,3,7};    ///从小到大排序    sort(a,a+5,cmp);///sort(a,a+5);也是默认排序    for(int i=0;i<5;i++){        cout<<a[i]<<" ";    }    cout<<endl;    ///从大到小排序    sort(a,a+5,cmp1);    for(int i=0;i<5;i++){        cout<<a[i]<<" ";    }}