Re: upgrade from V5R2 to V5R3.

Num isn't initialized in the below code so it's value is undetermined.

While (num=num) means assign the value of num to itself and if the result is
not-zero, do the while.

While (num == num) means while num equals num (always true), do the while.

While (num=num) is VERY bad coding and should pretty much not be done.

Bob

-----Original Message-----
From: c400-l-bounces+bob=cstoneindy.com@xxxxxxxxxxxx [mailto:c400-l-
bounces+bob=cstoneindy.com@xxxxxxxxxxxx] On Behalf Of Lim Hock-Chai
Sent: Monday, April 16, 2007 9:55 AM
To: C programming iSeries / AS400
Subject: [C400-L] upgrade from V5R2 to V5R3.

Our system admin upgraded our test system's OS from V5R2 to V5R3 this
pass weekend. After the upgrade, one of the C program quit working. I
did a debug and notice the following defected code (note: num contains 0
when executing the while statement):

int num;
while (num=num) {
. . .
. . .
}


I changed the while (num=num) to while(num==num) to correct the problem.

My question is why while (num=num) working in V5R2?


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