how to notify the EOF?

what should i put in the while condition?

Code:

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ifstream file3("idreport.txt");
        char buf1[20],buf2[20];
        while (this is not the END OF FILE)
        {
        file3.getline(buf1,20,' ');
        file3.getline(buf2,20,'\n');
        cout << "buf 1 is" << buf1 << "\n";
        cout << "buf2 is" << buf2 << "\n";
        }
        file3.close();

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thank you for helping

Code:

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while(!file.eof())

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