// 找出两个数组的共同元素
int* FindCommon(int* a, int* b, int nA, int nB, int& nOut)
{
    int i = 0;
    int j = 0 ;
	vector<int> vec_comm;

	int* output = NULL;
	
    while (i < nA && j < nB)
    {
        if (a[i] < b[j])
            ++i ;
        else if(a[i] == b[j])
        {
			vec_comm.push_back(a[i]);
            cout << a[i] << endl ;
            ++i ;
            ++j ;
        }
        else// a[i] > b[j]
            ++j ;
    }

	nOut = vec_comm.size();

	int nCoun = 0;
	if (nOut>0)
	{
		output=new int[nOut];
		vector<int>::iterator itorComm;

		for(itorComm=vec_comm.begin(); itorComm!=vec_comm.end(); itorComm++)
		{
			output[nCoun] = *itorComm;
			nCoun++;
		}
	}

	return output;
}


//cpp/8764