Question

How to check whether or not a given wide character is alphanumeric in C

Answer 1

#include <stdio.h>
#include <wchar.h>

int main(void)
{
    wchar_t str[] = L"C 17 Programming";

    if (iswalnum(str[0])) // 'C'
        wprintf(L"Alphanumeric\n");
    else  
        wprintf(L"Not Alphanumeric\n");

    if (iswalnum(str[3])) // '7'
        wprintf(L"Alphanumeric\n");
    else
        wprintf(L"Not Alphanumeric\n");

    if (iswalnum(str[1])) // ' '
        wprintf(L"Alphanumeric\n");
    else
        wprintf(L"Not Alphanumeric\n");

    return 0;
}




/*
run:

Alphanumeric
Alphanumeric
Not Alphanumeric

*/

 

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