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I'm trying to find a word rather then characters using string::Find?

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Started by DominicHughes April 02, 2012 09:49 AM

5 comments, last by DominicHughes 12 years ago

DominicHughes

143

Author

April 02, 2012 09:49 AM

Hi all trying to figure out how I can do this line

string &str = *it;



if(it->find(".obj"))

{



  cout << " Found Obj ! " << endl;



   //Draw Graphics



}

but string::Find can have character matches rather then the hole word itself qouted from

http://www.cplusplus...ng/string/find/

string[color=#000000][font=verdana, arial, helvetica, sans-serif]
to be searched for in the object. The entire content of [/font]str[color=#000000][font=verdana, arial, helvetica, sans-serif]
must be matched in some part of the string to be considered a match.[/font][/quote]

I really don't know if there is a way to hack it so it reads the hole word for it to match then just .o or b or j

Has anyone got any experience with this and could give me some hints/tips/anything else.

//for every occurence of .obj check if its not equal the string non value if(it->find(".obj") != std::string::npos) { //then output to cmd that its found obj cout << "Found .Obj" << endl; }

figured it out

WhiskyJoe

1,795

April 02, 2012 09:55 AM

I think http://www.cplusplus.com/reference/string/string/compare/ is what you are looking for.

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DominicHughes

143

Author

April 02, 2012 09:57 AM

I was looking at the before I shall look at it again and see if I can figure it out ;) but if anyone else has any other tips that would be great too just incase I screw this up

WhiskyJoe

1,795

April 02, 2012 12:13 PM

Do you want get ".obj" or do you want to get the individual characters?

In your example you are showing that you are looking for the extension and do something based on that.

if that is all you want, you can just take the length of your filename, extract 3 (or 4 including the dot) spaces and start reading in from there and compare it. Or you can do some string magic and start reading from where the dot begins if you want a more general way of handling this.

You can also do this with string::find though. This is also not the most elegant way I guess, but it should work.

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rip-off

11,000

April 02, 2012 01:06 PM

What, exactly, are you trying to do. Are you trying to determine the file extension of a file name?

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BitMaster

8,652

April 02, 2012 01:09 PM

First, std::string::find is overloaded to find whole strings (http://www.cplusplus.com/reference/string/string/find/) but returns the position of the found substring (or std::string::npos if the substring is not found), not a boolean value.

Aside from that, your code (after fixing) would accept any file containing the substring ".obj" as an object file, for example "mysubdir.obj/notanobjfile.txt". It would be better to find the rightmost "." (via rfind), extract the substring from there to the end and compare that to ".obj".

On the other hand I would personally never write code like that manually and just use boost::filesystem.

DominicHughes

143

Author

April 02, 2012 04:18 PM



//for every occurence of .obj check if its not equal the string non value

if(it->find(".obj") != std::string::npos)

{

//then output to cmd that its found obj

cout << "Found .Obj" << endl;

}

figured it out

I'm trying to find a word rather then characters using string::Find?

to be searched for in the object. The entire content of [/font]str[color=#000000][font=verdana, arial, helvetica, sans-serif]

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I'm trying to find a word rather then characters using string::Find?

to be searched for in the object. The entire content of [/font]str[color=#000000][font=verdana, arial, helvetica, sans-serif]

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