wcsspn() function in C/C++ with Examples

The wcsspn() is a built-in function in C/C++ which returns the length of maximum initial segment of the wide string that consists of characters present in another wide string. It is defined within the cwchar header file of C++.

Syntax:

wcsspn(des, src)

Parameters:The function accepts two mandatory parameters as described below.



  • des: specifies to a null terminated wide string to be searched.
  • src: specifies to a null terminated wide string containing the characters to search for.

Return Value: The function returns the length of the maximum initial segment of des that contains only the wide characters from wide string pointed to by src.

Below programs illustrate the above function.

Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// C++ program to illustrate the
// wcsspn() function
#include <cwchar>
#include <iostream>
using namespace std;
  
int main()
{
    wchar_t src[] = L"161106010";
    wchar_t des[] = L"6010IshwarGupta";
    int length = wcsspn(des, src);
  
    if (length > 0)
        wcout << des << L" contains " << 
                 length << L" initial numbers";
    else
        wcout << des << L" doesn't start with numbers";
  
    return 0;
}

chevron_right


Output:

6010IshwarGupta contains 4 initial numbers

Program 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// C++ program to illustrate the
// wcsspn() function
#include <cwchar>
#include <iostream>
using namespace std;
  
int main()
{
    wchar_t src[] = L"2018";
    wchar_t des[] = L"GeeksforGeeks";
    int length = wcsspn(des, src);
  
    if (length > 0)
        wcout << des << L" contains " << 
                 length << L" initial numbers";
    else
        wcout << des << L" doesn't start with numbers";
  
    return 0;
}

chevron_right


Output:

GeeksforGeeks doesn't start with numbers


My Personal Notes arrow_drop_up

Budding Web DeveloperKeen learnerAverage CoderDancer&Social Activist

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :
Practice Tags :


Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.