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Thread: An odd pointer error

  1. #1
    Join Date
    Jun 2015

    An odd pointer error


    Would you please have a look at this simple code (its name is test1)? I don't know why my VS 2015 compiler gives an error
    #include <iostream>
    using namespace std;
    int main() {
    	int* p = new int(4);
    	*(p + 0) = 2;
    	*(p + 1) = 4;
    	*(p + 2) = 6;
    	*(p + 3) = 8;
    	return 0;

    The error: test1.exe has triggered a breakpoint.

    I have installed my VS 2015 on Windows 7

  2. #2
    2kaud's Avatar
    2kaud is offline Super Moderator Power Poster
    Join Date
    Dec 2012

    Re: An odd pointer error

    int* p = new int(4);
    This doesn't do what you think it does. This creates a pointer to one integer value and gives that the value 4. I think you mean you want to create a pointer to memory holding 4 integers?
    int* p = new int[4];
    See http://www.cplusplus.com/doc/tutorial/dynamic/
    All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain https://creativecommons.org/publicdomain/zero/1.0/ and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!

    C++17 Compiler: Microsoft VS2019 (16.5.2)

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