upper_bound下确界

 //uppper_bound上确界找出首个大于某值的元素
 #include<algorithm>
 #include<iostream>

 using namespace std;

 int main()
 {
     int a[] = {, , , , , };
     int len = sizeof(a)/int (a);
     int *x = upper_bound(a, a+len, );

     cout<<"不小于7的上确界元素为"<<*x<<endl;

     system("pause");

     return ;
 }