command way for string manipulation?

[stefan.oedenkoven]

Hi ng,

could you tell me whats the common way to manipulate Strings in C/C++.
I'm a little bit confused, 'cause there are too many ways to do it ;-)

In my example i would like to open a file, replace 'Keyword1' with
'Keyword2' and save it to another file.
I'm using MS Visual C++ Toolkit (Commandline only).

When i use:
1) char[]: I've no adequate String operations
2) string: I've no '<<'-Operator for writing via 'cout' to my file
3) CString: I don't have the Class/Headers

Which way would a c/c++ take to have a runable programm under the most
common c/c++ compilers?

thanks & best regards,
Stefan

[pemo]

<st***************@gmx.de> wrote in message
news:11**********************@g44g2000cwa.googlegr oups.com...

Hi ng,

could you tell me whats the common way to manipulate Strings in C/C++.
I'm a little bit confused, 'cause there are too many ways to do it ;-)

In my example i would like to open a file, replace 'Keyword1' with
'Keyword2' and save it to another file.
I'm using MS Visual C++ Toolkit (Commandline only).

When i use:
1) char[]: I've no adequate String operations
2) string: I've no '<<'-Operator for writing via 'cout' to my file
3) CString: I don't have the Class/Headers

Which way would a c/c++ take to have a runable programm under the most
common c/c++ compilers?

Are the keywords the same length?

[Victor Bazarov]

st***************@gmx.de wrote:

could you tell me whats the common way to manipulate Strings in C/C++.
I suppose that the most common way would be to use 'std::string' class.
I'm a little bit confused, 'cause there are too many ways to do it ;-)
The usual way out of such confusion is to choose one and stick to it.
In my example i would like to open a file, replace 'Keyword1' with
'Keyword2' and save it to another file.
OK. Open a file, read it into, say, a vector of strings, search for
"Keyword1" in them, replace it if found, then write that vector of
strings into another file.
I'm using MS Visual C++ Toolkit (Commandline only).
That matters not.
When i use:
1) char[]: I've no adequate String operations
Really? What would be "adequate"?
2) string: I've no '<<'-Operator for writing via 'cout' to my file
What do you mean by that?
3) CString: I don't have the Class/Headers
Yes, that's MFC, which probably costs money to get.
Which way would a c/c++ take to have a runable programm under the most
common c/c++ compilers?

I'd still use 'std::string'. Whatever problems you have with writing it
out, post your code, we can help.

V

[stefan.oedenkoven]

Hi,

@pemo: No, Strings are not the same length

@Victor:
- An adequate String-operation would be
myString.replace("Keyword1","Keyword2")

Ok let's take std::string
But then my compiler is claiming that my std::string object has no
'<<'-Operator to push the String to the cout-stream... ;-(

(Sorry that i'm going on your nerves with such simple questions, but
the first steps are sometimes the most annoying ones)

[Victor Bazarov]

st***************@gmx.de wrote:

@Victor:
- An adequate String-operation would be
myString.replace("Keyword1","Keyword2")
You should be able to roll your own with help of 'find', 'erase', and
'insert'. It's called "programming".
Ok let's take std::string
But then my compiler is claiming that my std::string object has no
'<<'-Operator to push the String to the cout-stream... ;-(

What's a 'String'? It definitely not a standard class. Please post
the minimal complete code which causes your compiler to output that
message.

V

[Karl Heinz Buchegger]

st***************@gmx.de wrote:

Hi ng,

could you tell me whats the common way to manipulate Strings in C/C++.
I'm a little bit confused, 'cause there are too many ways to do it ;-)

In my example i would like to open a file, replace 'Keyword1' with
'Keyword2' and save it to another file.
I'm using MS Visual C++ Toolkit (Commandline only).

When i use:
1) char[]: I've no adequate String operations
2) string: I've no '<<'-Operator for writing via 'cout' to my file
You don't write to a file through cout. You write through a file stream
object. And just like any other output stream object there is a << operator
that writes std::string's.

3) CString: I don't have the Class/Headers

Which way would a c/c++ take to have a runable programm under the most
common c/c++ compilers?

thanks & best regards,
Stefan

--
Karl Heinz Buchegger
kb******@gascad.at

[Bronek Kozicki]

st***************@gmx.de wrote:

But then my compiler is claiming that my std::string object has no
'<<'-Operator to push the String to the cout-stream... ;-(

do you remember to:
#include <string>
#include <ostream>

?
B.

[John Harrison]

st***************@gmx.de wrote:

Hi ng,

could you tell me whats the common way to manipulate Strings in C/C++.
I'm a little bit confused, 'cause there are too many ways to do it ;-)

In my example i would like to open a file, replace 'Keyword1' with
'Keyword2' and save it to another file.
I'm using MS Visual C++ Toolkit (Commandline only).

When i use:
1) char[]: I've no adequate String operations
2) string: I've no '<<'-Operator for writing via 'cout' to my file
That's because you have forgotten to include the right header <string>.
Or you are including <iostream.h> instead of <iostream>, or <fstream.h>
instead of <fstream>, or some such header file problem. Of course you
can output a string to a file with << in C++.
3) CString: I don't have the Class/Headers

Which way would a c/c++ take to have a runable programm under the most
common c/c++ compilers?
There is no language called C/C++, for C choose option 1, for C++ choose
option 2, never choose option 3.

thanks & best regards,
Stefan

john

[stefan.oedenkoven]

thanks,
the problem was just including
<string.h>
instead of
<string>

AAAAAAAAAARGH!!

[Victor Bazarov]

st***************@gmx.de wrote:

thanks,
the problem was just including
<string.h>
instead of
<string>

AAAAAAAAAARGH!!

That'll teach ya! :-) This is a very simple rule: no C++ standard headers
have '.h' after the name. None. Whatsoever.

V