check if txt file

This is a discussion on check if txt file within the C++ Programming forums, part of the General Programming Boards category; I think there is a simple answer to this...how would i check if a file is a text file? after ...

  1. #1
    Registered User Boomba's Avatar
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    check if txt file

    I think there is a simple answer to this...how would i check if a file is a text file? after reading in my root directory using an if statement I wanna check for the .txt files in it and then load them into a combobox..but I dont know how to check whether it is a .txt file or not.

    thanx in advance,
    Boomba,

  2. #2
    End Of Line Hammer's Avatar
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    >>but I dont know how to check whether it is a .txt file or not.<<
    Are you asking how to tell if the filename ends .txt or the file itself contains only text (printable characters)?
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  3. #3
    C++ Developer XSquared's Avatar
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    Code:
    #include <iostream>
    #include <cstring>
    
    int main( void ) {
        char path[] = "C:\\test.txt";
        char *p = std::strrchr( path, '.' );
        
        if( p == NULL )
            std::cout<<"No '.' found."<<std::endl;
        else {
            if( std::strcmp( p, ".txt" ) == 0 )
                std::cout<<"Yep"<<std::endl;
            else
                std::cout<<"Nope"<<std::endl;
        }
    }
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  4. #4
    Registered User Boomba's Avatar
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    i'm trying to test whether is has .txt as an extension how would I do that in my if statement?..and the name.txt is recieved from a combobox so the "name" can be anything.

    thanx in advance,
    Boomba

  5. #5
    fuh
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    Attack hamster fuh's Avatar
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    I'm not that good at C++ but if there's a function you can use to find out the length of an array you could convert the filename into an array and check the last four letters (.txt),
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  6. #6
    End Of Line Hammer's Avatar
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    An example has already been given. There are of course other ways, try and find something that suits you best.
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

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