//10_15.cpp
#include <iostream>   
#include <numeric>   //包含數值算法頭文件
#include <functional>  //包含標準函數對象頭文件
using namespace std;

void main()
{
  int A[] = {1, 2, 3, 4, 5};
  const int N = sizeof(A) / sizeof(int);
  cout << "The result by multipling all elements in A is "
   << accumulate(A, A + N, 1, multiplies<int>()) //將標準函數對象傳遞給通用算法
   << endl;
}