iswcntrl() function in C/C++
The iswcntrl() is a built-in function in C++ STL which checks if the given wide character is a control character or not. It is defined within the cwctype header file of C/C++.
Syntax:
int iswcntrl(wint_t ch)
Parameter: The function accepts a single mandatory parameter ch which specifies the wide character which we have to check that if it is a control character or not.
Return Value: The function returns two values as shown below:
- If ch is a control character, then a non-zero value is returned.
- If it is not then it returns 0.
Below programs illustrates the above function.
Program 1:
// C++ program to illustrate the // iswcntrl() function #include <bits/stdc++.h> using namespace std; int main() { wchar_t ch1 = L '\n' ; // checks if it is a control character if (iswcntrl(ch1)) wcout << "It is a control Character" ; else wcout << "It is not a control Character" ; return 0; } |
Output:
It is a control Character
Program 2:
// C++ program to illustrate the // iswcntrl() function #include <bits/stdc++.h> using namespace std; int main() { wchar_t ch1 = L '@' ; // checks if it is a control character if (iswcntrl(ch1)) wcout << "It is a control Character" ; else wcout << "It is not a control Character" ; return 0; } |
Output:
It is not a control Character