string not working in c++

[Gaurav]

Hello,

I am using visual c++ 6 and i am having problems with string to work.

******** Here is the program project.cpp**** *****
#include <iostream.h>
#include <string>

#include "stdafx.h"

// This program just inverts the tickers.csv files execpt first line
int main(){

string ticker ;

return 0;
}
*************** ************

on compiling i get this error message
*************** ***********
Compiling...
StdAfx.cpp
Compiling...
Project.cpp
C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2065: 'string' :
undeclared identifier
C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2146: syntax error
: missing ';' before identifier 'ticker'
C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2065: 'ticker' :
undeclared identifier
Error executing cl.exe.

Project.exe - 3 error(s), 0 warning(s)
*************** *************

can someone tell me whats wrong here ?

thank you in advance.

Gaurav

[WW]

Re: string not working in c++

Gaurav wrote:[color=blue]
> #include <iostream.h>[/color]

Drop the .h!
#include <iostream>
[color=blue]
> #include <string>
>
> string ticker ;[/color]

std::string ticker;

--
WW aka Attila

[Mike Wahler]

Re: string not working in c++

"Gaurav" <bansal2425@hot mail.com> wrote in message
news:42983cb.03 10071125.33b7f6 54@posting.goog le.com...[color=blue]
> Hello,
>
> I am using visual c++ 6 and i am having problems with string to work.
>
> ******** Here is the program project.cpp**** *****[/color]
[color=blue]
> #include <iostream.h>[/color]

No such header in standard C++. The header which
declares the standard streams is <iostream> (no .h)
You're not using anything from it anyway, so you
can simply omit this line.
[color=blue]
> #include <string>[/color]

[color=blue]
> #include "stdafx.h"[/color]

A Microsoft specific header, not part of standard C++.
The code you've posted doesn't need it anyway, so
you can omit this line.
[color=blue]
> // This program just inverts the tickers.csv files execpt first line[/color]

Looks to me like all it does (tries to do) is define a string
object, then terminate.
[color=blue]
> int main(){
>
> string ticker ;[/color]

std::string ticker;
[color=blue]
>
> return 0;
> }[/color]

Applying changes I point out, we get:

#include <string>

int main()
{
std::string ticker;
return 0;
}

which will successfully compile without a diagnostic
on a compliant implementation, as well as with VC++ v6.0

[color=blue]
> *************** ************
>
> on compiling i get this error message
> *************** ***********
> Compiling...
> StdAfx.cpp
> Compiling...
> Project.cpp
> C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2065: 'string' :
> undeclared identifier[/color]

Accurate diagnostic message.
[color=blue]
> C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2146: syntax error
> : missing ';' before identifier 'ticker'[/color]

An artifact of the first message.
[color=blue]
> C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2065: 'ticker' :
> undeclared identifier[/color]

An artifact of the first message.
[color=blue]
> Error executing cl.exe.[/color]

Yup. :-)
[color=blue]
>
> Project.exe - 3 error(s), 0 warning(s)
> *************** *************
>
> can someone tell me whats wrong here ?[/color]

See above.

-Mike

[Gaurav]

Re: string not working in c++

"Mike Wahler" <mkwahler@mkwah ler.net> wrote in message news:<KKEgb.169 4$dn6.1630@news read4.news.pas. earthlink.net>. ..[color=blue]
> "Gaurav" <bansal2425@hot mail.com> wrote in message
> news:42983cb.03 10071125.33b7f6 54@posting.goog le.com...[color=green]
> > Hello,
> >
> > I am using visual c++ 6 and i am having problems with string to work.
> >
> > ******** Here is the program project.cpp**** *****[/color]
>[color=green]
> > #include <iostream.h>[/color]
>
> No such header in standard C++. The header which
> declares the standard streams is <iostream> (no .h)
> You're not using anything from it anyway, so you
> can simply omit this line.
>[color=green]
> > #include <string>[/color]
>
>[color=green]
> > #include "stdafx.h"[/color]
>
> A Microsoft specific header, not part of standard C++.
> The code you've posted doesn't need it anyway, so
> you can omit this line.
>[color=green]
> > // This program just inverts the tickers.csv files execpt first line[/color]
>
> Looks to me like all it does (tries to do) is define a string
> object, then terminate.
>[color=green]
> > int main(){
> >
> > string ticker ;[/color]
>
> std::string ticker;
>[color=green]
> >
> > return 0;
> > }[/color]
>
> Applying changes I point out, we get:
>
> #include <string>
>
> int main()
> {
> std::string ticker;
> return 0;
> }
>
> which will successfully compile without a diagnostic
> on a compliant implementation, as well as with VC++ v6.0
>
>[color=green]
> > *************** ************
> >
> > on compiling i get this error message
> > *************** ***********
> > Compiling...
> > StdAfx.cpp
> > Compiling...
> > Project.cpp
> > C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2065: 'string' :
> > undeclared identifier[/color]
>
> Accurate diagnostic message.
>[color=green]
> > C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2146: syntax error
> > : missing ';' before identifier 'ticker'[/color]
>
> An artifact of the first message.
>[color=green]
> > C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2065: 'ticker' :
> > undeclared identifier[/color]
>
> An artifact of the first message.
>[color=green]
> > Error executing cl.exe.[/color]
>
> Yup. :-)
>[color=green]
> >
> > Project.exe - 3 error(s), 0 warning(s)
> > *************** *************
> >
> > can someone tell me whats wrong here ?[/color]
>
> See above.
>
> -Mike[/color]

*************** *****
thanx

It works fine now. i have another problem using vector<string>



#include "stdafx.h"
#include <fstream>
//#include <ofstream.h>
#include <string>
#include <vector>

using namespace std;

// This program just inverts the tickers.csv files execpt first line
int main(){


//string ticker, line;
//string input,output;
//ifstream Tickers( "tickers.tx t", ios::in);
//ifstream Input_File;
//ofstream Output_File;
vector<string> temp;
/*
while(Tickers>> ticker){
input = "tempdata/" + ticker + ".csv";
output = "tempdata/" + ticker + "1.csv";
Input_File.open ( input.c_str(), ios::in);
Output_File.ope n ( output.c_str(), ios::app);
while ( Input_File >> line ){
temp.push_back( line);
}
Output_File << temp[0] << endl;
for ( unsigned i = ( temp.size() - 1 ); i > 0; i--)
Output_File << temp[i] << endl;
temp.clear();
Input_File.clos e();
Output_File.clo se();

}
*/

return 0;
}


Here effectively i just have vector<string> temp in main, everything
else is commented.

If i compile this program i get following warnings

*************** ******
Compiling...
project.cpp
C:\Windows\Desk top\project\pro ject.cpp(43) : warning C4786:
'std::reverse_i terator<std::ba sic_string<char ,std::char_trai ts<char>,std::a llocator<char>[color=blue]
> const *,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>
>,std::basic_st ring<ch[/color]
ar,std::char_tr aits<char>,std: :allocator<char > > const
&,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char> >
const *,int>' : identifier was truncated to '255' characters in the
debug information
C:\Windows\Desk top\project\pro ject.cpp(43) : warning C4786:
'std::reverse_i terator<std::ba sic_string<char ,std::char_trai ts<char>,std::a llocator<char>[color=blue]
> *,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>
>,std::basic_st ring<char,std[/color]
::char_traits<c har>,std::alloc ator<char> >
&,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char> >
*,int>' : identifier was truncated to '255' characters in the debug
information
c:\program files\microsoft visual studio\vc98\inc lude\vector(39) :
warning C4786: 'std::vector<st d::basic_string <char,std::char _traits<char>,s td::allocator<c har>[color=blue]
>,std::allocato r<std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>[color=green]
> >[/color]
>::vector<std:: basic_string<ch ar,std::char_tr aits<char>,std: :allocator<char >
>,std::allocato r<std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>[color=green][color=darkred]
> > >' : identifier was truncated to '255' characters in the debug[/color][/color][/color]
information
c:\program files\microsoft visual studio\vc98\inc lude\vector(60) :
warning C4786: 'std::vector<st d::basic_string <char,std::char _traits<char>,s td::allocator<c har>[color=blue]
>,std::allocato r<std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>[color=green]
> >[/color]
>::~vector<std: :basic_string<c har,std::char_t raits<char>,std ::allocator<cha r>
>,std::allocato r<std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>[color=green][color=darkred]
> > >' : identifier was truncated to '255' characters in the debug[/color][/color][/color]
information
Linking...

project.exe - 0 error(s), 4 warning(s)
*************** ********

how can i get rid of these ?

Also if i remove all the comments, i have problems with temp.clear()

All this program is doing is inverting about 40 files, whose names are
in tickers.txt.

thank you in advance.

Gaurav

[hongky]

Re: string not working in c++

in the top of the codes
u can do it as following, bcoz not namespace:):
....
#include <string>
....
using namespace std;

void fun()
{
std::string str;
}

"Gaurav" <bansal2425@hot mail.com> wrote in message
news:42983cb.03 10071125.33b7f6 54@posting.goog le.com...[color=blue]
> Hello,
>
> I am using visual c++ 6 and i am having problems with string to work.
>
> ******** Here is the program project.cpp**** *****
> #include <iostream.h>
> #include <string>
>
> #include "stdafx.h"
>
> // This program just inverts the tickers.csv files execpt first line
> int main(){
>
> string ticker ;
>
> return 0;
> }
> *************** ************
>
> on compiling i get this error message
> *************** ***********
> Compiling...
> StdAfx.cpp
> Compiling...
> Project.cpp
> C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2065: 'string' :
> undeclared identifier
> C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2146: syntax error
> : missing ';' before identifier 'ticker'
> C:\Windows\Desk top\Project\Pro ject.cpp(17) : error C2065: 'ticker' :
> undeclared identifier
> Error executing cl.exe.
>
> Project.exe - 3 error(s), 0 warning(s)
> *************** *************
>
> can someone tell me whats wrong here ?
>
> thank you in advance.
>
> Gaurav[/color]

[Mark Warren]

Re: string not working in c++

"Gaurav" <bansal2425@hot mail.com> wrote in message
news:42983cb.03 10072233.3ed2cb 33@posting.goog le.com...[color=blue]
>
> It works fine now. i have another problem using vector<string>
>
>
>
> #include "stdafx.h"
> #include <fstream>
> //#include <ofstream.h>
> #include <string>
> #include <vector>
>
> using namespace std;
>
> // This program just inverts the tickers.csv files execpt first line
> int main(){
>
>
> //string ticker, line;
> //string input,output;
> //ifstream Tickers( "tickers.tx t", ios::in);
> //ifstream Input_File;
> //ofstream Output_File;
> vector<string> temp;
> /*
> while(Tickers>> ticker){
> input = "tempdata/" + ticker + ".csv";
> output = "tempdata/" + ticker + "1.csv";
> Input_File.open ( input.c_str(), ios::in);
> Output_File.ope n ( output.c_str(), ios::app);
> while ( Input_File >> line ){
> temp.push_back( line);
> }
> Output_File << temp[0] << endl;
> for ( unsigned i = ( temp.size() - 1 ); i > 0; i--)
> Output_File << temp[i] << endl;
> temp.clear();
> Input_File.clos e();
> Output_File.clo se();
>
> }
> */
>
> return 0;
> }
>
>
> Here effectively i just have vector<string> temp in main, everything
> else is commented.
>
> If i compile this program i get following warnings
>
> *************** ******
> Compiling...
> project.cpp
> C:\Windows\Desk top\project\pro ject.cpp(43) : warning C4786:
>[/color]
'std::reverse_i terator<std::ba sic_string<char ,std::char_trai ts<char>,std::a l
locator<char>[color=blue][color=green]
> > const[/color][/color]
*,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>[color=blue][color=green]
> >,std::basic_st ring<ch[/color]
> ar,std::char_tr aits<char>,std: :allocator<char > > const
> &,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char> >
> const *,int>' : identifier was truncated to '255' characters in the
> debug information
> C:\Windows\Desk top\project\pro ject.cpp(43) : warning C4786:
>[/color]
'std::reverse_i terator<std::ba sic_string<char ,std::char_trai ts<char>,std::a l
locator<char>[color=blue][color=green]
> > *,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>
> >,std::basic_st ring<char,std[/color]
> ::char_traits<c har>,std::alloc ator<char> >
> &,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char> >
> *,int>' : identifier was truncated to '255' characters in the debug
> information
> c:\program files\microsoft visual studio\vc98\inc lude\vector(39) :
> warning C4786:[/color]
'std::vector<st d::basic_string <char,std::char _traits<char>,s td::allocator<c h
ar>[color=blue]
>
>,std::allocato r<std::basic_st ring<char,std:: char_traits<cha r>,std::allocat o[/color]
r<char>[color=blue][color=green][color=darkred]
> > >[/color][/color]
>
>::vector<std:: basic_string<ch ar,std::char_tr aits<char>,std: :allocator<char >
>
>,std::allocato r<std::basic_st ring<char,std:: char_traits<cha r>,std::allocat o[/color]
r<char>[color=blue][color=green][color=darkred]
> > > >' : identifier was truncated to '255' characters in the debug[/color][/color]
> information
> c:\program files\microsoft visual studio\vc98\inc lude\vector(60) :
> warning C4786:[/color]
'std::vector<st d::basic_string <char,std::char _traits<char>,s td::allocator<c h
ar>[color=blue]
>
>,std::allocato r<std::basic_st ring<char,std:: char_traits<cha r>,std::allocat o[/color]
r<char>[color=blue][color=green][color=darkred]
> > >[/color][/color]
>
>::~vector<std: :basic_string<c har,std::char_t raits<char>,std ::allocator<cha r
>
>
>,std::allocato r<std::basic_st ring<char,std:: char_traits<cha r>,std::allocat o[/color]
r<char>[color=blue][color=green][color=darkred]
> > > >' : identifier was truncated to '255' characters in the debug[/color][/color]
> information
> Linking...
>
> project.exe - 0 error(s), 4 warning(s)
> *************** ********
>
> how can i get rid of these ?[/color]

These can be safely ignored. If you want to hide them look in the MS
documentation for the #pragma method to do this. #pragma is not part of
standard C++, so any detailed questions about this should be directed to a
MS specific newsgroup.
[color=blue]
> Also if i remove all the comments, i have problems with temp.clear()[/color]

What problems exactly.

[Chris]

Re: string not working in c++

> If i compile this program i get following warnings[color=blue]
>
> *************** ******
> Compiling...
> project.cpp
> C:\Windows\Desk top\project\pro ject.cpp(43) : warning C4786:
> 'std::reverse_i terator<std::ba sic_string<char ,std::char_trai ts<char>,std::a llocator<char>[color=green]
> > const *,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>
> >,std::basic_st ring<ch[/color]
> ar,std::char_tr aits<char>,std: :allocator<char > > const
> &,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char> >
> const *,int>' : identifier was truncated to '255' characters in the
> debug information
> C:\Windows\Desk top\project\pro ject.cpp(43) : warning C4786:
> 'std::reverse_i terator<std::ba sic_string<char ,std::char_trai ts<char>,std::a llocator<char>[color=green]
> > *,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char>
> >,std::basic_st ring<char,std[/color]
> ::char_traits<c har>,std::alloc ator<char> >
> &,std::basic_st ring<char,std:: char_traits<cha r>,std::allocat or<char> >
> *,int>' : identifier was truncated to '255' characters in the debug
> information
>
> [...snip...]
>
> how can i get rid of these ?
>
> Also if i remove all the comments, i have problems with temp.clear()
>
> All this program is doing is inverting about 40 files, whose names are
> in tickers.txt.
>
> thank you in advance.
>
> Gaurav[/color]

This is a problem with VC. You need to include

#pragma warning(disable : 4786)

at the top of the relevant header files. If there are many then do it in stdafx.h

Cheers,

Chris