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    If you are getting an error What is an ntldr file in Windows XP, this guide has been written to help you.

    NTLDR (short for NT loader) is the loader for all versions of the Windows NT operating system up to and including Windows XP and Windows Server 2003. NTLDR is usually started from the main storage device, but it can also be started from a laptop. hard disk devices such as CD-ROM, USB flash drive or floppy disk.

    Here is a simplified case that can cause this warning. Hope this clarifies the reason for the warning :

     // Not allowed - usually results in a warningint answer (int question)    if ( question == 1 )        always returns 100;    different        if ( question == )            return 200;

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    For example, what happens if the question value is 3 or 10?

    This is undefined, but also illegal. Sources warn against this.

    If a function returns a value, the value returned by the function must be set more or less in all cases.

    But your case is fairly concurrent, which still produces this warning:

    // Zapfixed - still needs warningint max_of_two (int a, int b)    if (a>b)        return one;    different        if ( b>=a ) // We've covered all boolean types, but the compiler doesn't define them            return b;

    You’ll probably say to yourself, “But I’ve masked all the cases! No other dilemma is possible!”This is logically correct and the compiler is not aware of this process. Doesn’t it form a reflection table of all possible combinations with respect to a>b, b

    So how do you fix this error? This makes it clearer to the compiler that another case is possible. In this case, the correct code might be:

     // OK - no warningint max_of_two (int a definitely, int b)    if (a>b)        return one;    else // Now the compiler knows for sure that the other case is impossible        send b;

    A more informative question: Why does C++ allow you to exit with a warning and then not throw a compiler error?

    This request is discussed here:Why doesn’t passing at the end of a non-void without returning a value result in a compilation error?

    The DelftStack articles are written by fellow software enthusiastsLots of security, just like you. If you’d like to contribute more to DelftStack by writing paid articles, you’ll probably visit the Write for Yourself and Me page.

    If the command reaches the loop closure helper (}) of a function other than void without measuring the return operator, use return back the value of the function call is actually