Comp 1672, sections 1 and 2
Homework 7
Due Tuesday, Mar 4, 2003


1. The following function is supposed to return a pointer to 
the first even number in vec, or NULL if there is no such number. Identify 
and repair the error.

int* first_even(vector<int> vec)
{
	vector<int>::iterator itr(vec.begin());
	int even;
	while ((itr!=vec.end()) && (*itr%2!=0))
	{
		cout<<*itr<<" ";
		itr++;
	}
	if (itr==vec.end())
		return NULL;
	else
	{
		even=*itr;
		return &even;
	}
}
	

2. Find and fix the flaw(s) in the following function, which
returns a vector of size equal to the
minimum size of vec1 and vec2. Each element is the maximum of the 
corresponding elements of vec1 and vec2.

vector<float> max_vec(const vector<float> & vec1,const vector<float> & vec2)
{
	int min_length, i;
	if(vec1.size()<vec2.size())
		min_length=vec1.size();
	else
		min_length=vec2.size();
        vector <float> answer_vec;
	for(i=0;i<min_length;i++)
	{
		if(vec1[i]>vec2[i])
			answer_vec[i]=vec1[i];
		else
			answer_vec[i]=vec2[i];
	}
	return answer_vec;
}

3.  Find and fix the flaw(s) in the following code, which uses the Employee
class written during class (available on the course website, Feb 25)

int main()
{
    Employee *ep1, *ep2;

    // create a new employee, initialize its data, display it
    ep1 = new Employee("Maribeth", "Higgens", 10.5);    
    ep1->display();

    // create another new employee, initialize and display
    ep1 = new Employee("Marcus", "Hunter", 9.5);    
    ep1->display();

    // make a copy the existing employee and change the last name
    ep2 = ep1;
    ep2->lastname("Hinter");

    // get rid of the original employee
    delete ep1; 

    // display the second employee
    ep2->display();
    return 0;
}

4.  Implement the two unimplemented functions from the Employee class.