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#include<iostream>
#include<cstdlib>
using namespace std;
 
int NWD(int a, int b)
{
    if(b!=0)
    	return NWD(b,a%b);
 
    return a;
}
 
int main()
{
    int a, b;
 
    cout<<"Podaj dwie liczby: ";
    cin>>a>>b;
 
    cout<<"NWD("<<a<<","<<b<<") = "<<NWD(a,b)<<endl;
 
    system("pause");
    return 0;
}

Main.java:1: error: illegal character: '#'
#include<iostream>
^
Main.java:1: error: class, interface, or enum expected
#include<iostream>
        ^
Main.java:2: error: illegal character: '#'
#include<cstdlib>
^
Main.java:5: error: class, interface, or enum expected
int NWD(int a, int b)
^
Main.java:10: error: class, interface, or enum expected
    return a;
    ^
Main.java:11: error: class, interface, or enum expected
}
^
Main.java:17: error: class, interface, or enum expected
    cout<<"Podaj dwie liczby: ";
    ^
Main.java:18: error: class, interface, or enum expected
    cin>>a>>b;
    ^
Main.java:20: error: class, interface, or enum expected
    cout<<"NWD("<<a<<","<<b<<") = "<<NWD(a,b)<<endl;
    ^
Main.java:22: error: class, interface, or enum expected
    system("pause");
    ^
Main.java:23: error: class, interface, or enum expected
    return 0;
    ^
Main.java:24: error: class, interface, or enum expected
}
^
12 errors

Standard output is empty