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iswspace() function in C++ STL
In this article we are going to discuss the iswspace() function in C++, its syntax, working and its return values.
iswspace() function is an inbuilt function in C++ which is defined in header file. The function checks whether the passed wide character is a white space character or not.This function is a wide character equivalent of isspace(), which means it works the same as isspace() the difference is it supports a wide character. The function checks the if argument passed is a white space (‘ ‘) then return a non-zero integer value(true), else return zero(false)
Syntax
int iswspace(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 = ' ';
wint_t c = '1';
iswspace(a)?cout<<"\nIts white space character":cout<<"\nNot white space character";
iswspace(b)?cout<<"\nIts white space character":cout<<"\nNot white space character";
iswspace(c)?cout<<"\nIts white space character":cout<<"\nNot white space character";
}Output
If we run the above code it will generate the following output −
Not white space character Its white space character Not white space character
Example
#include <iostream>
#include <cwctype>
using namespace std;
int main () {
int i, count;
wchar_t s[] = L"I am visiting tutorials point";
count = i = 0;
while (s[i]) {
if(iswspace(s[i]))
count++;
i++;
}
cout<<"There are "<<count <<" white space characters.\n";
return 0;
}Output
If we run the above code it will generate the following output −
There are 4 white space characters.
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