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iswpunct() function in C++ STL
In this article we are going to discuss the iswpunct() function in C++, its syntax, working and its return values.
iswpunct() function is an inbuilt function in C++ which is defined in <cwctype> header file. The function checks whether the passed wide character is a punctuation character or not. This function is a wide character equivalent of ispunct(), which means it works the same as ispunct() the difference is it supports a wide character. So, the function checks if the argument passed is punctuation character then return any non zero integer value(true), else it will return zero(false)
Punctuation characters are as follows
! @ # $ % ^ & * ( ) “ ‘ , . / ; [ { } ] : ?Syntax
int iswpunct(wint_t ch);
The function accepts only one parameter, i.e. a wide character which is to be checked. The argument is casted in wint_t or WEOF.
wint_t stores an integral type of data.
Return value
The function returns an integer value, which can be either 0 (in case of false) or any non-zero value(in case of true).
Example
#include <iostream>
#include <cwctype>
using namespace std;
int main() {
wint_t a = '.';
wint_t b = 'a';
wint_t c = '1';
iswpunct(a)?cout<<"\nIts Punctuation character":cout<<"\nNot Punctuation character";
iswpunct(b)?cout<<"\nIts Punctuation character":cout<<"\nNot Punctuation character";
iswpunct(c)?cout<<"\nIts Punctuation character":cout<<"\nNot Punctuation character";
}Output
If we run the above code it will generate the following output −
Its Punctuation character Not Punctuation character Not Punctuation character
Example
#include <iostream>
#include <cwctype>
using namespace std;
int main () {
int i, count;
wchar_t s[] = L"@tutorials, point!!";
count = i = 0;
while (s[i]) {
if(iswpunct(s[i]))
count++;
i++;
}
cout<<"There are "<<count <<" punctuation characters.\n";
return 0;
}Output
If we run the above code it will generate the following output −
There are 4 punctuation characters.
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