C++ in komutu nasıl eklenir?

uses crt;

var s:string;i,k,a,b:integer;

begin

write('bir seyler sallayiniz = ');

read(s);

for i:=1 to length(s)do begin

if s[i] in ['0'..'9'] then k:=k+1;{<--- yada inc(k)burasi fark etmez

(c++ da k++ olarak bilinir)}

if s[i] in ['A'..'Z'] then b:=b+1;

if s[i] in ['a'..'z'] then a:=a+1;

end;

writeln(k,' tane sayi var');

writeln(b,' tane buyuk harf var');

writeln(a,' tane kucuk harf var')

end.

#include <iostream>

#define in ^
bool operator^(int value, std::string format)
{
    if(value < format[0] || value > format[3])
        return false;
    return true;
}

using namespace std;

int main()
{
    string s = "a2sSDg45345c.431Zc";

    if( s[4] in string("A..Z") )
    {
        cout << "Buyuk. \n";
    }

    if( s[1] in string("0..9") )
    {
        cout << "Sayi. \n";
    }
    return 0;
}