Convert to int

This is a discussion on Convert to int within the C++ Programming forums, part of the General Programming Boards category; hello can anybody say the code required to convert a string to integer datatype that is get a number as ...

  1. #1
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    Convert to int

    hello
    can anybody say the code required to convert a string to integer datatype

    that is get a number as a string type and convert it integer

    ex
    char num[10];
    cout<<"Enter a number: ";
    cin>>num;

    // convert num to int datatype so that arithmetic calcs is possible

  2. #2
    Drunken Progammer CaptainMorgan's Avatar
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    Its hard... But im here swgh's Avatar
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    A char can hold a small integer type, but captainMorgans link is useful to you
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  4. #4
    samurai warrior nextus's Avatar
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    it puzzles me why dont you start with int from the beginning and save yourself the trouble of converting? because "cin" can take int input also...
    nextus, the samurai warrior

  5. #5
    Cat without Hat CornedBee's Avatar
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    Because forum members keep recommending doing it the way he does it?
    All the buzzt!
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  6. #6
    MFC killed my cat! manutd's Avatar
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    That is simply wasteful of time and resources. Just start out with an int. If for some reson you need to use C style strings, there is a nonstandard function atoi that will convert for you.
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    Reverse Engineer maxorator's Avatar
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    I think strtol() is better...
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  8. #8
    and the hat of wrongness Salem's Avatar
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    > it puzzles me why dont you start with int from the beginning and save yourself the trouble of converting?
    Because functions which do input AND conversion have such complicated error recovery procedures (which almost nobody follows, and which noobs certainly don't).

    Reading the input into a string, then attempting the conversion allows you to separate input errors from conversion errors.
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