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Thread: bytes!!!

  1. #1
    Join Date
    Apr 2013


    Hello!!!I have a question... How many bytes has the array int b[5]={0,0,0,0,0}???

    My teacher said it has 18 bytes,but I think it has 10 bytes...
    Which answer is the right one???

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

    Re: bytes!!!

    b is an array of 5 ints. So the answer must be a multiple of 5 - so the teacher's answer is wrong!

    The correct answer depends upon the size of an int. If an int size is 16 bits (ie 2 bytes) then the correct answer is 10. If an int size is 32 bits (ie 4 bytes) then the correct answer is 20.

    Try this program

    #include <iostream>
    using namespace std;
    int main()
    int b[5]={0,0,0,0,0};
    	cout << "An int has " << sizeof(int) << " bytes" << endl;
    	cout << "int b[5] has " << sizeof(b) << " bytes" << endl;
    	return 0;
    On my system it prints 4 and 20.
    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 VS2017 (15.7.3)

  3. #3
    Join Date
    Apr 2013

    Re: bytes!!!

    Great... Thank you!!!

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