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[C++] Explain to me

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Heartless
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Posted: Fri Aug 24, 2007 11:16 am Post subject: [C++] Explain to me

I'm not sure what my book is trying to tell me so I'll ask you guys. for(int = 0; count < 10; count++) The red part is checking when to start, right? The blue part is checking when to stop? The yellow part is telling it what to do? I'm confuse, please explain this to me. _________________ What dosen't kill you, usually does the second time.

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UnLmtD
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Posted: Fri Aug 24, 2007 11:23 am Post subject:

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This is how I do it, it increases x by one every loop.

Code:

for ( int x = 0; x < 10; x++ ) {}

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Last edited by UnLmtD on Fri Aug 24, 2007 11:25 am; edited 1 time in total

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zart
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Posted: Fri Aug 24, 2007 11:24 am Post subject: Re: [C++] Explain to me

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HornyAZNBoy wrote:

I'm not sure what my book is trying to tell me so I'll ask you guys.

for(int = 0; count < 10; count++)

The red part is checking when to start, right?
The blue part is checking when to stop?
The yellow part is telling it what to do?

I'm confuse, please explain this to me.

Sort of correct... The first part of the statement is used to initialize things, it is not nessecary though - normally this is where you set the variable your using. The second part is the condition, so yes "for how long". The last part is what your telling it to do every iteration
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Heartless
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Posted: Fri Aug 24, 2007 11:29 am Post subject:

So what your saying is that you don't always need the part in red. _________________ What dosen't kill you, usually does the second time.

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UnLmtD
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Posted: Fri Aug 24, 2007 11:30 am Post subject:

You need it. _________________

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DemonDays!
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Posted: Fri Aug 24, 2007 11:37 am Post subject:

always declare it out of the loop check.

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zart
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Posted: Fri Aug 24, 2007 11:46 am Post subject:

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UnLmtD wrote:

You need it.

No you don't. You can compile a for loop to be infinite, the following does work:

for(; Wink

Wink

@aznboy

You don't NEED it, but it's a good place to initialize or reset your incrementing value
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UnLmtD
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Posted: Fri Aug 24, 2007 11:52 am Post subject:

Yes for an infinite loop, but I don't see him do for(count < 10; count++) And I beleive that's what he was asking for. _________________

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zart
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Posted: Fri Aug 24, 2007 11:54 am Post subject:

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UnLmtD wrote:

Yes for an infinite loop, but I don't see him do for(count < 10; count++) And I beleive that's what he was asking for.

he's asking WHAT the statement means.

this is a completely valid for loop:

for(; count < 10; count++)

As long as count has already been initialized. Well technically it will work even if it hasn't been - but it will just grab random memory and the output won't be nice Wink

Wink

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lurc
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Posted: Fri Aug 24, 2007 12:37 pm Post subject: Re: [C++] Explain to me

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HornyAZNBoy wrote:

I'm not sure what my book is trying to tell me so I'll ask you guys.

for(int = 0; count < 10; count++)

The red part is checking when to start, right?
The blue part is checking when to stop?
The yellow part is telling it what to do?

I'm confuse, please explain this to me.

Code:

for(
int count = 0; //Start Loop at 0
count < 10; // Loop for as long as count is lower then 10
count++ // increment by 1
)
{
cout << "hi" << endl;
}

Output:

hi
hi
hi
hi
hi
hi
hi
hi
hi

So this will basically say hi until the loop is over 10.
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Robotex
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Posted: Fri Aug 24, 2007 7:56 pm Post subject:

you can make it also for(;;Sleep(100)) { <code here> } usefull for making loops in threads _________________ ASM/C++ Coder Project Speranza lead developer

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Noz3001
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Posted: Sat Aug 25, 2007 3:13 am Post subject:

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I usually use the last param just to keep track of how many times it has looped.

Code:

if (x == 10) break;

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