String - spaced out words

This is a discussion on String - spaced out words within the C++ Programming forums, part of the General Programming Boards category; Hi, I have a few lines of text, looks something like: QF File 47.0030 output1 A B Long Result 659.6406 ...

  1. #1
    Registered User
    Join Date
    Nov 2006
    Posts
    224

    String - spaced out words

    Hi,

    I have a few lines of text, looks something like:

    QF File
    47.0030 output1
    A B Long Result
    659.6406 107.3926 37.0000 0
    659.8189 107.4216 37.0100 0
    659.9972 107.4506 37.0200 0
    660.1755 107.4797 37.0300 0
    660.3538 107.5087 37.0400 0
    I want to make this in to a CSV.

    Code:
    			getline(multiple[i], linestr);
    
    			if ((linestr == "") || (multiple[i].eof()))
    			{
    				if(i == 1)
    					resf << ",";
    				else
    					resf << ",,";
    			}
    			else
    			{
    
    
    }
    Whats the best way to do this?

    I just want to collect the data (not the white space) and replace the whitespace by a comma.

    Cheers

  2. #2
    Registered User manasij7479's Avatar
    Join Date
    Feb 2011
    Location
    Kolkata@India
    Posts
    2,498
    I'd do it like this(Using console for now, adapt for any ifstream) :
    Code:
    #include<iostream>
    #include<iterator>
    int main()
    {
        std::istream_iterator<double> it(std::cin),eos;
        for(;it!=eos;++it)
            std::cout<<*it<<',';
    }
    Manasij Mukherjee | gcc-4.8.2 @Arch Linux
    Slow and Steady wins the race... if and only if :
    1.None of the other participants are fast and steady.
    2.The fast and unsteady suddenly falls asleep while running !



  3. #3
    Frequently Quite Prolix dwks's Avatar
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    Canada
    Posts
    8,046
    Is this just a one-time task? If you don't mind using scripting languages it's pretty easy...
    Code:
    $ cat /tmp/input 
    QF File
    47.0030 output1
    A B Long Result
    659.6406 107.3926 37.0000 0
    659.8189 107.4216 37.0100 0
    659.9972 107.4506 37.0200 0
    660.1755 107.4797 37.0300 0
    660.3538 107.5087 37.0400 0
    $ awk '{ print $1 "," $2 "," $3 "," $4 }' /tmp/input 
    QF,File,,
    47.0030,output1,,
    A,B,Long,Result
    659.6406,107.3926,37.0000,0
    659.8189,107.4216,37.0100,0
    659.9972,107.4506,37.0200,0
    660.1755,107.4797,37.0300,0
    660.3538,107.5087,37.0400,0
    $
    Just as an example. In C++ I'd do something similar to manasij, except without fancy stream iterators...
    Code:
    std::string line;
    std::getline(std::cin, line);
    
    // now let's make a stringstream out of "line"
    std::istringstream stream(line);
    
    // okay, so read 4 words from the stringstream. If there are fewer than 4, we'll get empty strings.
    std::string word;
    for(int i = 0; i < 4; i ++) {
        word = "";
        stream >> word;
        std::cout << word;
        if(i + 1 < 4) std::cout << ",";
    }
    Something like that.
    dwk

    Seek and ye shall find. quaere et invenies.

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