converting string to int

This is a discussion on converting string to int within the C++ Programming forums, part of the General Programming Boards category; Hello! How to convert string to int? Is there any standart function for this. atoi() doesn't work. one way is ...

  1. #1
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    converting string to int

    Hello!
    How to convert string to int?
    Is there any standart function for this.
    atoi() doesn't work. one way is to convert string to char array and then atoi().
    is there something short like
    int x=str.toint();

  2. #2
    End Of Line Hammer's Avatar
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    There are quite a few threads about this topic....

    strtol()
    atoi().

    Do a board search to find examples.


    [edit]
    If your talking about a c++ string object, don't forget about this.
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  3. #3
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    string str("234");
    int var=atoi(str);

    gives compiler error because it can handle only
    char arrays;

    I find that stringstream is useful.

  4. #4
    End Of Line Hammer's Avatar
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    gives compiler error because it can handle only
    char arrays;
    If your talking about a c++ string object, don't forget about this.
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  5. #5
    ¡Amo fútbol!
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    string whatever="12345678";
    atoi(whatever.c_str());

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