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Hello all,

I try to store number 01 in integer i like this : int i = 01; cout
<< i ;

It simply prints 1. What I want is to print 01.

Is it possible ?

Thanks.
Gopesh

On Sep 16, 12:24*am, gopesh patel <patelgop...@gmail.com> wrote:
> Hello all,
>
> I try to store number 01 in integer i like this : *int i = 01; *cout
> << i ;

You do not understand what "int" means. More generally, you do not
understand how numbers are represented in a computer. There is no such
thing as an "int with value 01". There is only value 1. "0" is just
padding that you can add when you turn your "int" into a string of
characters (which happens for you when you "insert" a number into a
stream).

>
> It simply prints 1. *What I want is to print 01.
>
> Is it possible ?

Try

#include <iomanip>

cout << setw(2) << setfill('0') << i;

Goran.

On Sep 16, 9:12*am, Goran Pusic <gor...@cse-semaphore.com> wrote:
> On Sep 16, 12:24*am, gopesh patel <patelgop...@gmail.com> wrote:
>
> > Hello all,
>
> > I try to store number 01 in integer i like this : *int i = 01; *cout
> > << i ;
>
> You do not understand what "int" means. More generally, you do not
> understand how numbers are represented in a computer. There is no such
> thing as an "int with value 01". There is only value 1. "0" is just
> padding that you can add when you turn your "int" into a string of
> characters (which happens for you when you "insert" a number into a
> stream).
>

>
>
> > It simply prints 1. *What I want is to print 01.
>
> > Is it possible ?
>
> Try
>
> #include <iomanip>
>
> cout << setw(2) << setfill('0') << i;
>
> Goran.

Thanks for your answers.
I do understand what integer means and how computer stores it.
I try to be more specific. I dont want to pad 0 to int i in cout. So
iomanip is useless for me.
What I want is when I convert integer 1 to string, the value of string
should become 01 (I want to pad 0 to string after converting it from
int).
Any ideas ?

gopesh patel wrote:
> On Sep 16, 9:12 am, Goran Pusic <gor...@cse-semaphore.com> wrote:
>> On Sep 16, 12:24 am, gopesh patel <patelgop...@gmail.com> wrote:
>>
>>> Hello all,
>>> I try to store number 01 in integer i like this : int i = 01; cout
>>> << i ;
>> You do not understand what "int" means. More generally, you do not
>> understand how numbers are represented in a computer. There is no such
>> thing as an "int with value 01". There is only value 1. "0" is just
>> padding that you can add when you turn your "int" into a string of
>> characters (which happens for you when you "insert" a number into a
>> stream).
>>
>
>>
>>> It simply prints 1. What I want is to print 01.
>>> Is it possible ?
>> Try
>>
>> #include <iomanip>
>>
>> cout << setw(2) << setfill('0') << i;
>>
>> Goran.
>
> Thanks for your answers.
> I do understand what integer means and how computer stores it.
> I try to be more specific. I dont want to pad 0 to int i in cout. So
> iomanip is useless for me.
> What I want is when I convert integer 1 to string, the value of string
> should become 01 (I want to pad 0 to string after converting it from
> int).
> Any ideas ?

#include <iomanip>
#include <iostream>
#include <sstream>
#include <string>

int main()
{
int i = 1;
std:stringstream oss;
oss << std::setw(2) << std::setfill('0') << i;
std::string s = oss.str();
std::cout << s << '\n';
return 0;
}

Cheers,
Stu

On Sep 16, 1:54*pm, Stuart Golodetz <b...@blah.com> wrote:
> gopesh patel wrote:
> > On Sep 16, 9:12 am, Goran Pusic <gor...@cse-semaphore.com> wrote:
> >> On Sep 16, 12:24 am, gopesh patel <patelgop...@gmail.com> wrote:
>
> >>> Hello all,
> >>> I try to store number 01 in integer i like this : *int i = 01; *cout
> >>> << i ;
> >> You do not understand what "int" means. More generally, you do not
> >> understand how numbers are represented in a computer. There is no such
> >> thing as an "int with value 01". There is only value 1. "0" is just
> >> padding that you can add when you turn your "int" into a string of
> >> characters (which happens for you when you "insert" a number into a
> >> stream).
>
> >>> It simply prints 1. *What I want is to print 01.
> >>> Is it possible ?
> >> Try
>
> >> #include <iomanip>
>
> >> cout << setw(2) << setfill('0') << i;
>
> >> Goran.
>
> > Thanks for your answers.
> > I do understand what integer means and how computer stores it.
> > I try to be more specific. I dont want to pad 0 to int i in cout. So
> > iomanip is useless for me.
> > What I want is when I convert integer 1 to string, the value of string
> > should become 01 (I want to pad 0 to string after converting it from
> > int).
> > Any ideas ?
>
> #include <iomanip>
> #include <iostream>
> #include <sstream>
> #include <string>
>
> int main()
> {
> * * * * int i = 1;
> * * * * std:stringstream oss;
> * * * * oss << std::setw(2) << std::setfill('0') << i;
> * * * * std::string s = oss.str();
> * * * * std::cout << s << '\n';
> * * * * return 0;
>
> }
>
> Cheers,
> Stu

Thank you very much Stuart and all who cleared my question.

gopesh patel wrote:
> On Sep 16, 1:54 pm, Stuart Golodetz <b...@blah.com> wrote:
>> gopesh patel wrote:
>>> On Sep 16, 9:12 am, Goran Pusic <gor...@cse-semaphore.com> wrote:
>>>> On Sep 16, 12:24 am, gopesh patel <patelgop...@gmail.com> wrote:
>>>>> Hello all,
>>>>> I try to store number 01 in integer i like this : int i = 01; cout
>>>>> << i ;
>>>> You do not understand what "int" means. More generally, you do not
>>>> understand how numbers are represented in a computer. There is no such
>>>> thing as an "int with value 01". There is only value 1. "0" is just
>>>> padding that you can add when you turn your "int" into a string of
>>>> characters (which happens for you when you "insert" a number into a
>>>> stream).
>>>>> It simply prints 1. What I want is to print 01.
>>>>> Is it possible ?
>>>> Try
>>>> #include <iomanip>
>>>> cout << setw(2) << setfill('0') << i;
>>>> Goran.
>>> Thanks for your answers.
>>> I do understand what integer means and how computer stores it.
>>> I try to be more specific. I dont want to pad 0 to int i in cout. So
>>> iomanip is useless for me.
>>> What I want is when I convert integer 1 to string, the value of string
>>> should become 01 (I want to pad 0 to string after converting it from
>>> int).
>>> Any ideas ?
>> #include <iomanip>
>> #include <iostream>
>> #include <sstream>
>> #include <string>
>>
>> int main()
>> {
>> int i = 1;
>> std:stringstream oss;
>> oss << std::setw(2) << std::setfill('0') << i;
>> std::string s = oss.str();
>> std::cout << s << '\n';
>> return 0;
>>
>> }
>>
>> Cheers,
>> Stu
>
> Thank you very much Stuart and all who cleared my question.

It's worth observing that the answer I gave was essentially the same
answer Goran gave, just adapted to your specific situation. The only
real change I made was to use a std:stringstream in place of
std::cout. I guess another way of putting that would be that one output
stream is much like another when it comes to things like this (worth
bearing in mind).

Regards,
Stu