On 31/12/12 01:33 PM, Zbigniew Komarnicki wrote:
Is this OK or is this a bug, when the wariable 'n' is
initializing by negative value? There no any warning.
Is this normal? I know that value -5 is converted
to unsigned but probably this should by printed a warning,
when this is a constant value. What do you think about this?
// prog.cpp
#include<iostream>
using namespace std;
int main()
{
const unsigned int n = -5;
cout<< "The variable n is: "<< n<< endl;
return 0;
}
Results:
$ g++ -Wall -W prog.cpp -o prog
$ ./prog
The variable n is: 4294967291
Thank you.
C and C++ don't protect you from your own mistakes. Do not expect
consistent behaviour from "const unsigned int n = -5;". The results will
almost certainly differ between 32 bit and 64 bit machines, as well as
between x86 and other architectures.
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