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From: alfann on 2 Jun 2010 06:55
Hi
I don't know about my problem in while loop
I put inside the while loop this equation:

Total=Total+Tot;

and Tot equals to value

but the problem is about Total which showed me equal to zero???!!!!


Just to make sure:
I set:
Total=0;
before the while loop.

Could you help me?
From: Luca Zanotti Fragonara on 2 Jun 2010 11:27
alfann <alfann.net(a)hotmail.com> wrote in message <1570042142.266068.1275490591914.JavaMail.root(a)gallium.mathforum.org>...
> Hi
> I don't know about my problem in while loop
> I put inside the while loop this equation:
>
> Total=Total+Tot;
>
> and Tot equals to value
>
> but the problem is about Total which showed me equal to zero???!!!!
>
>
> Just to make sure:
> I set:
> Total=0;
> before the while loop.
>
> Could you help me?

1) I think that you have imposed a bad logical condition on the while, and the code jump your while loop.

2) It is always better to post the complete code, so it is easier to debug it.
From: alfann on 2 Jun 2010 07:51
for j = 1:a %columns


for i = 1:b %Rows
count_row=0;
Total=0;
count_all=0;
R1_count=0;
L1_count=0;
T1_count=0;
D1_count=0;

while(U3(i+count_row,j)==1 && i~=1 && j~=1 && i~=b && j~=a)

if(U3(i+count_row,j+1)~=1) %clc. right
R1=U1(i+count_row,j+1);
R1_count=R1_count+1;
else
R1=0;
R1_count=0;
end

if(U3(i+count_row,j-1)~=1)%clc. left
L1=U1(i+count_row,j-1);
L1_count=L1_count+1;
else
L1=0;
L1_count=0;
end

if(U3(i+count_row+1,j)~=1)%clc. top
T1=U1(i+count_row+1,j);
T1_count=T1_count+1;
else
T1=0;
T1_count=0;
end

if(U3(i+count_row-1,j)~=1)%clc. down
D1=U1(i+count_row-1,j);
D1_count=D1_count+1;
else
D1=0;
D1_count=0;
end
Tot=R1+L1+T1+D1;
Total=Total+Tot;
Count=R1_count+L1_count+T1_count+D1_count;
count_all=count_all+Count;
count_row=count_row+1;
end

end
end
From: Walter Roberson on 2 Jun 2010 12:26
alfann wrote:
> for j = 1:a %columns
>
>
> for i = 1:b %Rows
> count_row=0;
> Total=0;

You overwrite Total with 0 for every row

> while(U3(i+count_row,j)==1 && i~=1 && j~=1 && i~=b && j~=a)

And there, on the last iteration, the row (i) will be b and so the while
loop will not execute, which will leave Total sitting at 0.
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