understanding pointers
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Thread: understanding pointers

  1. #1
    Join Date
    Oct 2013
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    understanding pointers

    Hi,
    I am new to pointer world. I have started programming in c++ and have basic knowledge in c.

    Code:
        char y[]="helloo";
        char *p=y;
        cout<< p[1];
    This prints 'e'

    if I print:

    Code:
     cout<< p
    I get hello. I am unable to underatnd why. It should actually print address of y array!

  2. #2
    Join Date
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    England
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    Re: understanding pointers

    It should actually print address of y array!
    It prints correctly. p is a pointer to a char which has been set to the address pointed to by y. cout sees that the type of p is of char * (pointer to char) and so treats it as a c null-terminated string and prints its contents.
    All advice is offered in good faith only. You are ultimately responsible for effects of your programs and the integrity of the machines they run on.

  3. #3
    Join Date
    Oct 2013
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    12

    Re: understanding pointers

    @PM2kaud- Thank you for your reply.
    So basically with string, the base address is passed and
    Code:
    cout
    prints until it finds '\0'

    Please correct me, if I am wrong.

    Quote Originally Posted by 2kaud View Post
    It prints correctly. p is a pointer to a char which has been set to the address pointed to by y. cout sees that the type of p is of char * (pointer to char) and so treats it as a c null-terminated string and prints its contents.

  4. #4
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    Re: understanding pointers

    Yes - for a c-style null terminated string. In c++ there is also a class called string which is very different.
    All advice is offered in good faith only. You are ultimately responsible for effects of your programs and the integrity of the machines they run on.

  5. #5
    Join Date
    Oct 2013
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    Re: understanding pointers

    Ohh.
    Thank you once again.
    Quote Originally Posted by 2kaud View Post
    Yes - for a c-style null terminated string. In c++ there is also a class called string which is very different.

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