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Hello,

I have a strange problem with some of my c++ code. I have a normal for-
loop like this

for(int i = 1; .....

on MS-Windows with a Microsoft compiler everything is alright, but
when I compile the same source on Linux with gcc-3.4, the variable "i"
is "0" in the first pass of the loop.

Anyone knows the answer of my problem? Maybe a compiler flag?

Thx!
Markus

wrote:
> I have a strange problem with some of my c++ code. I have a normal
> for- loop like this
>
> for(int i = 1; .....

Not sure what's normal about five periods. I've never seen any
program that would actually use that construct.

> on MS-Windows with a Microsoft compiler everything is alright, but
> when I compile the same source on Linux with gcc-3.4, the variable "i"
> is "0" in the first pass of the loop.
>
> Anyone knows the answer of my problem? Maybe a compiler flag?

Maybe. But for the hell of it, I cannot make your program compile
anywhere. My compiler keeps telling me something in line with
"an executable statement outside of any function". I suggest to
look in the FAQ, #5.8.

V
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On 14 Nov., 17:56, "Victor Bazarov" <v.Abaza...@comAcast.net> wrote:
> markus.l...@googlemail.com wrote:
> > I have a strange problem with some of my c++ code. I have a normal
> > for- loop like this
>
> > for(int i = 1; .....
>
> Not sure what's normal about five periods. I've never seen any
> program that would actually use that construct.

I mean a standard for-loop like

for (int i=1; i<10; i++)
{
if(i=9) {...}

}

but "i" start from 0 inside the loop, not from 1 and I don't know why.
This is strange because under windows everything runs fine.

wrote:
> On 14 Nov., 17:56, "Victor Bazarov" <v.Abaza...@comAcast.net> wrote:
>> markus.l...@googlemail.com wrote:
>>> I have a strange problem with some of my c++ code. I have a normal
>>> for- loop like this
>>
>>> for(int i = 1; .....
>>
>> Not sure what's normal about five periods. I've never seen any
>> program that would actually use that construct.
>
> I mean a standard for-loop like
>
> [..]

I mean you need to read the FAQ 5.8 and do what it says. For real!

V
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I do not respond to top-posted replies, please don't ask

On Nov 14, 12:15 pm, "markus.l...@googlemail.com"
<markus.l...@googlemail.com> wrote:
> On 14 Nov., 17:56, "Victor Bazarov" <v.Abaza...@comAcast.net> wrote:
>
> > markus.l...@googlemail.com wrote:
> > > I have a strange problem with some of my c++ code. I have a normal
> > > for- loop like this
>
> > > for(int i = 1; .....
>
> > Not sure what's normal about five periods. I've never seen any
> > program that would actually use that construct.
>
> I mean a standard for-loop like
>
> for (int i=1; i<10; i++)
> {
> if(i=9) {...}
>
> }
>
> but "i" start from 0 inside the loop, not from 1 and I don't know why.
> This is strange because under windows everything runs fine.

Give us a short, self-contained program that demonstrates the error.
Or, please copy and paste the following program, compile and execute
it, and report back on the results:

#include <iostream>

int main()
{
bool flag = false;
for (int i = 1; i<10; ++i) {
if (i==0) flag = true;
}
std::cout << "Markus was "
<< (flag ? "right" : "wrong")
<< '.';
}

Best regards,

Tom

>>> I have a strange problem with some of my c++ code. I have a normal
>>> for- loop like this
>>> for(int i = 1; .....
>> Not sure what's normal about five periods. I've never seen any
>> program that would actually use that construct.
>
> I mean a standard for-loop like
>
> for (int i=1; i<10; i++)
> {
> if(i=9) {...}
>
> }
>
> but "i" start from 0 inside the loop, not from 1 and I don't know why.
> This is strange because under windows everything runs fine.
>

Hmm, if(i=9) {...} *assigns* the value 9 to i (the result of which
evaluates to true). Are you sure that it shouldn't be "=="?

Stefan wrote:
>>>> I have a strange problem with some of my c++ code. I have a normal
>>>> for- loop like this
>>>> for(int i = 1; .....
>>> Not sure what's normal about five periods. I've never seen any
>>> program that would actually use that construct.
>>
>> I mean a standard for-loop like
>>
>> for (int i=1; i<10; i++)
>> {
>> if(i=9) {...}
>>
>> }
>>
>> but "i" start from 0 inside the loop, not from 1 and I don't know
>> why. This is strange because under windows everything runs fine.
>>
>
> Hmm, if(i=9) {...} *assigns* the value 9 to i (the result of which
> evaluates to true). Are you sure that it shouldn't be "=="?

Still, that wouldn't cause the 'i' to "start from 0 inside the loop",
would it? That's why I insist that the OP posts real complete code.

V
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