Why the variablle's value is so weird

[yezi]

HI:

The code I write is :

static int numTrial;
static float perCentage;
static int gapValue;
static int inValue;


for( gapValue = inValue; gapValue <= MAX_GAP; gapValue = (gapValue +
GAP_STEP)){

for (perCentage = 0.0; perCentage <= 1.0;perCentage = (perCentage
+0.1)){

for (numTrial = 0; numTrial < 5 ; numTrial ++){

Send packet sequence to the End Node;

printf("gap %d, percentage %d,Numtrial
%d\n",gapValue,perCentage,numTrial);
}
}
}

Suppose the percentage should be 0.0. 1.0, 2.0 . however the value is
0.0 , -1610612736
The numTrial should be 0, 1,2,3,4,, however the value is 0,1069128089.

Why, is my declariation sth wrong, if I delete the "static", same thing
happens.

Thanks for any comments.

 

[Michael Mair]

HI:

The code I write is :

static int numTrial;
static float perCentage;
static int gapValue;
static int inValue;


for( gapValue = inValue; gapValue <= MAX_GAP; gapValue = (gapValue +
GAP_STEP)){

for (perCentage = 0.0; perCentage <= 1.0;perCentage = (perCentage
+0.1)){

for (numTrial = 0; numTrial < 5 ; numTrial ++){

Send packet sequence to the End Node;

printf("gap %d, percentage %d,Numtrial
%d\n",gapValue,perCentage,numTrial);
}
}
}

This code is not valid, compiling C.
Provide a minimal example.

Suppose the percentage should be 0.0. 1.0, 2.0 . however the value is
0.0 , -1610612736
The numTrial should be 0, 1,2,3,4,, however the value is 0,1069128089.

Read
http://c-faq.com/fp/index.html
If there are still questions afterwards, feel free to ask.

Why, is my declariation sth wrong, if I delete the "static", same thing
happens.

I would be puzzled if it did change the behaviour drastically.
Reread the parts about "static" in your textbook.

Cheers
Michael

 

[Mark McIntyre]

static float perCentage;

printf("gap %d, percentage %d,Numtrial %d\n",gapValue,perCentage,numTrial);

perCentage is a float, you're trying to print it with %d.

Please read your C book to learn about the format specifiers for
printf.

Mark McIntyre

 

[August Karlstrom]

perCentage is a float, you're trying to print it with %d.

....and "percentage" is one word (no need for camel casing).


August

 

[Kenneth Brody]

yezi wrote:
[...]

static int numTrial;
static float perCentage;
static int gapValue; [...]
printf("gap %d, percentage %d,Numtrial %d\n",gapValue,perCentage,
numTrial);

[...]

You lied to printf. You told it to expect an int as the second value,
and then gave it perCentage, which is a float.

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| Kenneth J. Brody | www.hvcomputer.com | |
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Don't e-mail me at: <mailto:[email protected]>

 

[Randy Howard]

August Karlstrom wrote

...and "percentage" is one word (no need for camel casing).

Hmmm. I had to go look up "Camel casing", having never heard it
described as that before. Informative wiki article. Now I know
why I haven't head it. It was made up only 11 years ago, or
"yesterday".

I have heard it referred to as medial capitals though.