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// Using the generic accumulate algorithm to compute a product,

// using a function object.

#include <vector.h>

#include <algo.h>

#include <assert.h>

class multiply {

public:

int operator()(int x, int y) const { return x * y; }

};

int main()

{

cout << "Using generic accumulate algorithm to "

<< "compute a product." << endl;

int x[5] = {2, 3, 5, 7, 11};

// Initialize vector1 to x[0] through x[4]:

vector<int> vector1(x, x+5);

int product = accumulate(vector1.begin(), vector1.end(),

1, multiply());

assert(product == 2310);

}