Use int type or qint32 as a loop iterator

Please_Help_me_D

Hi,

More philosophical question.
As far as I know Qt standard types like quint16, qint32, qin64 etc guarantee that it take 2, 4 and 8 bytes respectively to store every number on any type of machine.
But there is standart loop like:

for (int i; i < 100; i++){
    //body of loop
}

that is usually written with iterator type int (in every code). Usually it is not a problem if on a developer computer type int is a 4-byte integer and on another it may take 8 bytes (are there such situations?). But from the side of politeness to other developpers is it ok to write loops with Qt stadart types ?? like:

for (qint32 i; i < 100; i++){
    //body of loop
}

I'm sorry if I don't fully understand the difference between int and qint32

Christian Ehrlicher

@Please_Help_me_D said in Use int type or qint32 as a loop iterator:

I'm sorry if I don't fully understand the difference between int and qint32

There isn't a difference.

Christian Ehrlicher

@Please_Help_me_D said in Use int type or qint32 as a loop iterator:

I'm sorry if I don't fully understand the difference between int and qint32

There isn't a difference.

J.Hilk

@Please_Help_me_D like @Christian-Ehrlicher said, there is no real difference,
but most access functions, like for example QVector::at(int), expect an int.

So you will get a warning, when using the variable inside the loop, in such a fashion, and you'll have to cast it, to silence the warning.

Please_Help_me_D

@Christian-Ehrlicher and @J-Hilk thank you!

Kent-Dorfman

If coding for the platform then it's ok to use the Qt types. If the function is more generic then use the equivalent standard types. As for myself: I generally use standard types even if Qt aliases them.

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