iswblank() function in C/C++

The function iswblank() is used to check that the passed wide character is blank or not. It is basically a space character and it also considers tab character(\t). This function is declared in “ctype.h” header file in C language and “cctype”” header file in C++ language.

Here is the syntax of isblank() in C++ language,

int iswblank(wint_t char);

Here is an example of iswblank() in C++ language,

Example

 Live Demo

#include <ctype.h>
#include <iostream>
using namespace std;
int main() {
   wchar_t s[] = L"The space between words.";
   int i = 0;
   int count = 0;
   while(s[i]) {
      char c = s[i++];
      if (iswblank(c)) {
         count++;
      }
   }
   cout << "\nNumber of blanks in sentence : " << count << endl;
   return 0;
}

Output

Number of blanks in sentence : 5

In the above program, a string is passed in variable s. The function iswblank() is used to check the spaces or blanks in the passed string as shown in the following code snippet.

wchar_t s[] = L"The space between words.";
int i = 0;
int count = 0;
while(s[i]) {
   char c = s[i++];
   if (iswblank(c)) {
      count++;
   }
}