#include <iostream>
#include <cctype>
using namespace std;
int main()
{
    /*
    Character Classification Functions in C++ Programming
      isalnum
      isalpha
      isdigit
      islower
      isupper
      isspace
    */
    char a[6]="R@ 1a";
    for (int i=0; i<=5; i++)
    {
        if(isspace(a[i]))
            cout<<a[i]<<" Space"<<endl;
    }
    return 0;
}