Examples from Kernighan book

This is a discussion on Examples from Kernighan book within the C Programming forums, part of the General Programming Boards category; Hi. I am new to programming and i started with C. I bought the Kernighan book, but some example programmes ...

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    Examples from Kernighan book

    Hi. I am new to programming and i started with C. I bought the Kernighan book, but some example programmes do not work for me. I am running GCC on a Linux system. Specifically, the example included in section 1.7 Functions does not work for me (power function). Thank you very much

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    and the hat of wrongness Salem's Avatar
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    Can you be more specific than "doesn't work"?

    OK, I'm going to take a stab that you need to link with the math library, since you did mention pow()
    Try invoking the compiler with a command line such as this.
    gcc prog.c -lm

    The last bit (minus-el-em) tells the linker to also search the math library.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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    Sorry. I meant the output is not the expected. But, i tried the same code on other computer (newer), and it does work on this new laptop. I am suprised. But i do not know how it can be. Thank you very much

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    The example he's referring to just raises an integer to a nonnegative integer power by using a loop. It doesn't link to the math library. On exactly what compiler and platform does this code not work, and are you sure you didn't mistype something? It's pretty simple.

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    Registered User ssharish2005's Avatar
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    On what machine did that work. What compiler was it on the working machine. Did you try the same input as with the not working machine?

    ssharish2005

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    and the hat of wrongness Salem's Avatar
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    *shrug*
    Copy / paste your code and terminal session, showing the compilation and running steps.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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