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vector of pointers

This is a discussion on vector of pointers within the C++ Programming forums, part of the General Programming Boards category; how do I get the value of 'a' from the vector ? Code: int a = 5, *b = &a; ...

  1. #1
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    vector of pointers

    how do I get the value of 'a' from the vector ?

    Code:
    int a = 5, *b = &a;
    vector<int*> v;
    v.push_back(b);
    cout << ?
    edit:
    found how:
    *v[0]
    Last edited by jaymz; 10-12-2011 at 06:24 PM.

  2. #2
    Super Moderator VirtualAce's Avatar
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    Why not store integers in the vector instead of pointers to integers?

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    Quote Originally Posted by VirtualAce View Post
    Why not store integers in the vector instead of pointers to integers?
    I agree with you. I would totally avoid using pointers in this case, but unfortunately I am forced to

    Now I discovered another inconvenience of doing this. I am now pushing more values into it. While iterating through this vector, it only prints out the last value pushed for each v[i] vector position. How to fix this ? Maybe I'm not pushing correctly and my vector has the same (last pushed) value all over ?

  4. #4
    Registered User gardhr's Avatar
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    Quote Originally Posted by jaymz View Post
    I agree with you. I would totally avoid using pointers in this case, but unfortunately I am forced to

    Now I discovered another inconvenience of doing this. I am now pushing more values into it. While iterating through this vector, it only prints out the last value pushed for each v[i] vector position. How to fix this ? Maybe I'm not pushing correctly and my vector has the same (last pushed) value all over ?
    Let me guess - you're pushing a pointer to the same value each and every time? Perhaps you should post your code so that we can see what's going on...
    Last edited by gardhr; 10-12-2011 at 07:36 PM.
    iMalc likes this.

  5. #5
    Algorithm Dissector iMalc's Avatar
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    Putting the address of a local variable inside a container of pointers, is a huge red flag.
    Show us some code and we'll work out how you should be doing it.
    My homepage
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