iswprint() in C/C++ with Examples

The iswprint() is a built-in function in C/C++ which checks if the given wide character can be printed or not. It is defined within the cwctype header file of C++. By default, the following characters are printable:

Digits (0 to 9)
Uppercase letters (A to Z)
Lowercase letters (a to z)
Punctuation characters (!”#$%&'()*+, -./:;?@[\]^_`{|}~)
Space

Syntax:

int iswprint(ch)

Parameters: The function accepts a single mandatory parameter ch which specifies the wide character which has to be checked if printable or not.

Return Value: The function returns two values as shown below.

If the parameter ch, is printable, then a non-zero value is returned.
If it is not a printable character then 0 is returned.

Below programs illustrates the above function.

Program 1:

// Program to illustrate 
// towprint() function 
#include <cwchar> 
#include <cwctype> 
#include <iostream> 
using namespace std; 
int main() 
{ 
  
    wchar_t str[] = L"Geeks\tfor\tGeeks"; 
    for (int i = 0; i < wcslen(str); i++) { 
  
        // Function to check if the characters are 
        // printable or not. If not, then replace 
        // all non printable character by comma 
        if (!iswprint(str[i])) 
            str[i] = ', '; 
    } 
    wcout << "Printing, if the given wide  
    character cannot be printed\n"; 
    wcout << str; 
    return 0; 
} 

Output:

Printing , if the given wide character cannot be printed
Geeks, for, Geeks

Program 2:

// Program to illustrate 
// towprint() function 
#include <cwchar> 
#include <cwctype> 
#include <iostream> 
using namespace std; 
int main() 
{ 
  
    wchar_t str[] = L"Ishwar Gupta\t123\t!@#"; 
    for (int i = 0; i < wcslen(str); i++) { 
  
        // Function to check if the characters are 
        // printable or not. If not, then replace 
        // all non printable character by comma 
        if (!iswprint(str[i])) 
            str[i] = ', '; 
    } 
    wcout << "Printing, if the given wide  
    character cannot be printed\n"; 
    wcout << str; 
    return 0; 
} 

Output:

Printing , if the given wide character cannot be printed
Ishwar Gupta, 123, !@#

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