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#include <iostream>
using namespace std;
 
template <class T>
bool greater (const T&a, const T&b) { return true; } // moze greater() jest w super_tajna_biblioteka, nie wiem, bez tego nie działa to pomyslalem, ze includa nie ma
 
 
template <class T, typename comp = greater<T> >
class klasa {
	public:
	klasa(const T &a, const T &b) {
		cout << comp(a, b);
	}
};
 
int main() {
	klasa<int> a(1, 2);
	return 0;
}

prog.cpp:8:36: error: expected type-specifier before ‘greater’
 template <class T, typename comp = greater<T> >
                                    ^
prog.cpp:8:36: error: expected ‘>’ before ‘greater’
prog.cpp: In function ‘int main()’:
prog.cpp:17:11: error: template argument 2 is invalid
  klasa<int> a(1, 2);
           ^
prog.cpp:17:14: error: invalid type in declaration before ‘(’ token
  klasa<int> a(1, 2);
              ^
prog.cpp:17:19: error: expression list treated as compound expression in initializer [-fpermissive]
  klasa<int> a(1, 2);
                   ^
prog.cpp:17:19: warning: left operand of comma operator has no effect [-Wunused-value]
prog.cpp:17:13: warning: unused variable ‘a’ [-Wunused-variable]
  klasa<int> a(1, 2);
             ^

Standard output is empty