判断vector是否存在另外一个vector

#include <iostream>
#include <algorithm>

using namespace std;

bool includes(int *p, int i, int j, int *q, int a, int b)
{
    while (i != j)
	{
		if (p[i] > q[a])
			break;
		else if (p[i] < q[a])
			i++;
		else
		{
			a++;
		}

		if (a == b)
			return true;
	}

	return false;
}

int main()
{
	int container[] = {5, 10, 40, 15, 60, 20, 25, 65, 30, 20, 35, 40, 45, 50};
	int continent[] = {65, 40, 60, 30, 20, 10, 30, 20, 10};

	sort(container, container + 10);
	sort(continent, continent + 4);

	if (includes(container, 0, 10
		, continent, 0, 4))
	{
		cout << "container includes continent!" << endl;
	}

	if (includes(container, 0,  10
		, continent, 0, 4))
	{
		cout << "container includes continent!" << endl;
	}

	return 0;
}