超好用的小函数：min_element和max_element

转来的，留着以后用。

头文件：#include<algorithm>

作用：返回容器中最小值和最大值。max_element(first,end,cmp);其中cmp为可选择参数!

#include<iostream>  
#include<algorithm>  
using namespace std;  
  
bool cmp(int a,int b)  
{  
    return a<b;  
}  
int main()  
{  
    int num[]={2,3,1,6,4,5};  
    cout<<"最小值是 "<<*min_element(num,num+6)<<endl;  
    cout<<"最大值是 "<<*max_element(num,num+6)<<endl;  
    cout<<"最小值是 "<<*min_element(num,num+6,cmp)<<endl;  
    cout<<"最大值是 "<<*max_element(num,num+6,cmp)<<endl;  
    return 0;   
}  

真滴好用