COMP 1672 Sections 1 & 2
Homework #3
Due Tuesday morning, January 28, 2002


1. What is the output from the following program?  Give an explanation
of what is happening line-by-line

#include <iostream>
#include <string>
using namespace std;

void bar(int *input);

int main()
{
	int nums[5];
	nums[0] = 10;
	nums[1] = 100;
	nums[2] = 1000;
	nums[3] = 2000;
	nums[4] = 3000;

	bar(nums);
	return 0;
}

void bar(int *input)
{
	cout << *input << endl;
	input++;
	cout << *input << endl;
	input+=2;
	cout << *input << endl;
	input++;
	cout << *input << endl;
}

2. What is the output from the following code segment?  As part of your
explanation, draw a picture of memory.  Decide on your own memory addresses,
but use them consistently.

	int x = 6;
	int y = 7;
	int *p = &x;
	int *q = &y;
	cout << x << " " << y << " " << p << " " << q << " "
             << *p << " " << *q << endl;

	*p = 7;
	cout << x << " " << y << " " << p << " " << q << " "
             << *p << " " << *q << endl;
	if(p == q)
	{
		cout << "Equal" << endl;
	}

	p = q;
	y = 10;
	cout << x << " " << y << " " << p << " " << q << " "
             << *p << " " << *q << endl;

3. Write a program using vectors that does the following (in order).

Puts the integer 3 into the vector
Puts 6 in the last position in the vector
Puts 8 in the last position in the vector
Removes the last element from the vector
Prints out the vector's size
Puts 5 into the list position in the vector
Uses an iterator to print out all the elements contained in the vector on
separate lines
Empties the vector