Initialization of non-character arrays with memset may cause errors

Source: Internet
Author: User

function:memset is the initialization of a single byte.

Possible error: if an int array is initialized to an integer other than 0, an error occurs, such as:

memset (arr, 1, sizeof (int) *length)
Each number is initialized to 00000001 00000001 00000001 00000001. And not 1.

#include <iostream> #include <algorithm> #include <iterator> #include <memory.h>using namespace std;void updatearray (int arr[], const int& length) {    int index = 2;    int value = 3;    Arr[index] = value;//    * (arr+index) = value;//    * (arr+index) + +;} int main () {    const int length = 6;    int arr[length];    memset (arr, 0, sizeof (int) *length);    Updatearray (arr, length);    Copy (arr, arr+length, ostream_iterator<int> (cout, ""));    cout<<endl;    return 0;}


Initialization of non-character arrays with memset may cause errors

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.