Create two tables similar to the one attached and then trace the
values of i and j from the programs below.
__________________________________

Value of index i	Value of index j	 Test condition for I	Test condition
for J	What is displayed?
	
0	0	(I <= 3) TRUE	(j <= 2) TRUE	0 0	
	1		        (j <= 2) TRUE	0 1	
	2		        (j <= 2) TRUE	0 2	
	3		        (J <= 2  FALSE		
1	0	(I <= 3)  TRUE	(j <= 2) TRUE	1 0	
	1		        (j <= 2) TRUE	1 1	
			        (j <= 2)TRUE	1 2	
2					
?.	?.	?.	?.	?.	
?	?	?	?.	?.	
				
____________________________________________
#include <iostream.h>
main ()
{
int i = 0, j = 0;
while (i <= 3)
{
for (j = 0; j <=2; j++)
cout << i << j << endl;
i++;
}
return 0;
}
__________________________________________
#include (iostream.h>
main()
{
int i = 0, j = 0;
for (i = 0; i < 3; i++)
{
for (j = 3; j > 0; j-)
{
if (i ==0)
cout << j << endl;
else 
cout << i << j << endl;
}
}
cout << "Endl of loops\n";
return 0;
}

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Request for Question Clarification by leapinglizard-ga on 14 Oct 2005 20:18 PDT

Is this a school assignment?

leapinglizard

---

Clarification of Question by ariella-ga on 14 Oct 2005 23:33 PDT

This question was a question I got wrong in my homework that I now
need to study for an exam.

Dear ariella,


The point of these exercises is to keep track of the value of each loop's
iterating variable. In both cases, the iterating variable of the outside
loop is i, while the inside loop iterates over j. In order to adhere to 
the pattern established by the sample table, we show the value of i only 
when it changes. Furthermore, when the iterating variable changes but the
loop does not execute again because its test condition has become false,
we display this in the table as well.


In the first exercise, the inside loop stops executing when j becomes 3,
and the outside loop stops when i becomes 4.

value of i  value of j  test for i      test for j      displayed
----------  ----------  ----------      ----------      ---------
0           0           (i <= 3) TRUE   (j <= 2) TRUE   0 0
            1                           (j <= 2) TRUE   0 1
            2                           (j <= 2) TRUE   0 2
            3                           (j <= 2) FALSE
1           0           (i <= 3) TRUE   (j <= 2) TRUE   1 0
            1                           (j <= 2) TRUE   1 1
            2                           (j <= 2) TRUE   1 2
            3                           (j <= 2) FALSE
2           0           (i <= 3) TRUE   (j <= 2) TRUE   2 0
            1                           (j <= 2) TRUE   2 1
            2                           (j <= 2) TRUE   2 2
            3                           (j <= 2) FALSE
3           0           (i <= 3) TRUE   (j <= 2) TRUE   3 0
            1                           (j <= 2) TRUE   3 1
            2                           (j <= 2) TRUE   3 2
            3                           (j <= 2) FALSE
4           3           (i <= 3) FALSE


In the second exercise, the inside loop stops executing when j becomes 0,
and the outside loop stops when i becomes 3.

value of i  value of j  test for i      test for j      displayed
----------  ----------  ----------      ----------      ---------
0           3           (i < 3) TRUE    (j > 0) TRUE    3
            2                           (j > 0) TRUE    2
            1                           (j > 0) TRUE    1
            0                           (j > 0) FALSE
1           3           (i < 3) TRUE    (j > 0) TRUE    1 3
            2                           (j > 0) TRUE    1 2
            1                           (j > 0) TRUE    1 1
            0                           (j > 0) FALSE
2           3           (i < 3) TRUE    (j > 0) TRUE    2 3
            2                           (j > 0) TRUE    2 2
            1                           (j > 0) TRUE    2 1
            0                           (j > 0) FALSE
3           0           (i < 3) FALSE


It has been a pleasure to address this question on your behalf.


Regards,

leapinglizard