Need help.

This is a discussion on Need help. within the C++ Programming forums, part of the General Programming Boards category; Hello, this is my source code so far: Code: #include <fstream> #include <iostream> #include <string> using namespace std; string fileName; ...

  1. #1
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    Apr 2006
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    Need help.

    Hello, this is my source code so far:

    Code:
    #include <fstream>
    #include <iostream>
    #include <string>
    
    using namespace std;
    
    string fileName;
    string fileCont;
    
    using namespace std;
    
    int main()
    {
    
    cout<<"What filename should we use? ";
    cin>>fileName;
    cin.ignore();
    cin.get();
    cout<<"What content should we statch into the file? ";
    cin>>fileCont;
    cin.ignore();
    ofstream file ("." << fileName);
    file<<"." << fileCont;
    cin.get();
    return 0;
    }
    and it gives me this error when I compile:

    22 C:\Documents and Settings\user\Desktop\lolcoolnohax.cpp no match for 'operator<<' in '"." << fileName'

    What the hell is happening? I don't have a clue what the error is.

  2. #2
    Guest Sebastiani's Avatar
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    Waterloo, Texas
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    >> ofstream file ("." << fileName);

    what are you trying to do there?
    Code:
    #include <cmath>
    #include <complex>
    bool flip(bool value)
    {
           return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0)*(1 << (value + 2)))
        ).real() < 0;
    }

  3. #3
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    Quote Originally Posted by Sebastiani
    >> ofstream file ("." << fileName);

    what are you trying to do there?
    I am, trying to make the user type in a filename and the content for the file, then use ofstream to make the file. Fairly simple but the errors keep coming.


    Kind of let the user make his own custom file.

  4. #4
    Registered User Tonto's Avatar
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    Code:
    ofstream file (fileName.c_str());

  5. #5
    Guest Sebastiani's Avatar
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    Waterloo, Texas
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    what exactly do you think this expression evaluates to:

    "." << fileName

    the ofstream object is expecting a const char * as it's first parameter, but that expression does not yield an object of that type (unless of course you have somewhere overloaded operator << (const char *, const string &) to do so).
    Code:
    #include <cmath>
    #include <complex>
    bool flip(bool value)
    {
           return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0)*(1 << (value + 2)))
        ).real() < 0;
    }

  6. #6
    Registered User
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    Thank you.

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