Thread: delete array - get error

  1. #1
    Registered User
    Join Date
    Oct 2001
    Posts
    3

    delete array - get error

    I am using test code listed below.
    it's giving me a segmentation fault at the delete []ch; line.

    #include <iostream.h>
    int main()
    {
    char* ch = new char[3];
    ch = "ts";
    cout << "ch is: " << ch << endl;
    cout << "deleting heap" << endl;

    // here is where the problem is.
    delete []ch;

    cout << "deleted" << endl;
    cout << "creating new array" << endl;
    ch = new char[3];
    cout << "setting value" << endl;
    ch = "ab";
    cout << "ch is: " << ch << endl;
    return 0;
    }

    Do you know why I'm getting this error?
    Any help would be appreciated
    Thanks!

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
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    You're not deleting the same pointer you created with new

    char* ch = new char[3];
    ch = "ts"; // this overwrites the pointer
    delete []ch; // BOOM!


    char* ch = new char[3];
    strcpy(ch,"ts"); // copy the string to where ch points
    cout << "ch is: " << ch << endl;
    cout << "deleting heap" << endl;
    delete []ch; // this should work
    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.

  3. #3
    Registered User
    Join Date
    Oct 2001
    Posts
    3

    Thanks!

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