[Bug c++/42472] New: class members not getting assigned access thru another method
I have two variables in the Class primes i,p and they are assigned with values
in the constructor but they are not reflected in the method isprimes.
pr4.h
#include
#include
#include
#include
using namespace std;
#define MAX 65535
class primes {
typedef unsigned long ulong;
ulong pr[MAX];
ulong prm[MAX];
ulong p;
ulong i;
ulong maxp;
public:
primes();
primes(ulong p);
bool isprime();
inline void nextnumber();
inline void storeprime();
inline void showprime();
void saveprimes(const string fname);
bool next();
};
primes::primes(ulong p):maxp(p) { primes(); }
pr4.cpp
===
#include "pr4.h"
int main()
{
primes prm(10);
do {
if (prm.isprime())
prm.storeprime();
prm.showprime();
} while(prm.next());
prm.saveprimes("output4.txt");
}
primes::primes()
{
cout << "primes" << endl;
i = 0;
pr[i++] = 2;
pr[i++] = 3;
pr[i++] = 5;
p = 7;
cout << "default constructor " << endl;
cout << this->i << endl;
cout << this->p << endl;
}
bool primes::isprime()
{
ulong cmax = ulong(sqrt(p));
if (cmax > pr[2]) {
for(int i =2; pr[i] && pr[i]<=cmax; i++)
if (!(p%pr[i])) return false;
}
cout << "isprime" << i << " " << p << endl;
return true;
}
inline void primes::nextnumber() {
static bool flag = true;
if (flag)
{p += 4; flag = false;}
else
{p += 2; flag = true;}
return;
}
inline bool primes::next() {
nextnumber();
return (maxp > p);
}
inline void primes::storeprime() {
cout << i << " . " << p << endl;
pr[i++] = p;
cout << p << endl;
}
inline void primes::showprime() {
if (!(i%1000)) cout << i << " " << pr[i-1] << endl;
}
void primes::saveprimes(const string fname)
{
fstream output;
output.open(fname.c_str());
for(int i =0; pr[i] && i
using namespace std;
unsigned long bit32()
{
unsigned long n = 0;
n--;
cout << n << endl;
n++;
cout << n << endl;
}
lib.h
==
unsigned long bit32();
--
Summary: class members not getting assigned access thru another
method
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: k_suresh_babu at yahoo dot com
GCC build triplet: g++ 4.3.2 on cygnus
GCC host triplet: g++ 4.3.2 on cygnus
GCC target triplet: g++ 4.3.2 on cygnus
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42472
[Bug c++/42472] class members not getting assigned access thru another method
--- Comment #2 from k_suresh_babu at yahoo dot com 2009-12-25 02:43 ---
Subject: Re: class members not getting assigned access thru another method
Hi,
So a constructor can't call another method if that is the case then it is ok.
You can close the issue.
regards,
sureshbk.
--- On Wed, 12/23/09, redi at gcc dot gnu dot org
wrote:
> From: redi at gcc dot gnu dot org
> Subject: [Bug c++/42472] class members not getting assigned access thru
> another method
> To: k_suresh_b...@yahoo.com
> Date: Wednesday, December 23, 2009, 5:09 AM
>
>
> --- Comment #1 from redi at gcc dot gnu dot org
> 2009-12-23 11:09 ---
> C++ is not java, you cannot delegate to another constructor
> like this:
>
> primes::primes(ulong p):maxp(p) { primes(); }
>
> That creates a temporary object of type primes, it does not
> call the
> constructor.
>
> Therefore primes::i and primes::p are not initialised by
> the primes(long)
> constructor.
>
>
> --
>
> redi at gcc dot gnu dot org changed:
>
> What
> |Removed
> |Added
>
>
> Status|UNCONFIRMED
> |RESOLVED
> Resolution|
>
> |INVALID
>
> Version|unknown
> |4.3.2
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42472
>
> --- You are receiving this mail because: ---
> You reported the bug, or are watching the reporter.
>
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42472
[Bug c++/42472] class members not getting assigned access thru another method
--- Comment #4 from k_suresh_babu at yahoo dot com 2010-02-04 07:07 --- Subject: Re: class members not getting assigned access thru another method palo, thank you for the clarification. You can close the bug. regards, sureshbk. --- On Fri, 12/25/09, paolo dot carlini at oracle dot com wrote: > From: paolo dot carlini at oracle dot com > Subject: [Bug c++/42472] class members not getting assigned access thru > another method > To: k_suresh_b...@yahoo.com > Date: Friday, December 25, 2009, 3:50 AM > > > --- Comment #3 from paolo dot carlini at oracle dot > com 2009-12-25 09:50 --- > Yes, in C++03 (C++0x will be different), a constructor > cannot call *another > constructor*. > > > -- > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42472 > > --- You are receiving this mail because: --- > You reported the bug, or are watching the reporter. > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42472
