Question

#!/usr/bin/env perl
use warnings;
use 5.012;
use Inline 'C';

my $value = test();
say $value;

__END__
__C__
void test() {
    int a = 4294967294;
    Inline_Stack_Vars;
    Inline_Stack_Reset;
    Inline_Stack_Push( sv_2mortal( newSViv( a ) ) );
    Inline_Stack_Done;
}

Output:

-2

Why do I get here an output of “-2”?

Answer 1

int a uses probably 32-bit representation. You should use unsigned int if you want to represent values above 4,294,967,296/2.