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int main() {
	fstream file;
	file.open("test.txt", ios::in);
 
	if (plik.is_open()) {
		std::cin.imbue(std::locale(""));
		int k;
		file>> k;
		std::cout << k << "\n";
	}
	else
		cout << "ERROR!" << endl;
 
	file.close();
	system("pause");
	return 0;
}

Main.java:1: error: class, interface, or enum expected
int main() {
^
Main.java:1: error: class, interface, or enum expected
int main() {
    ^
Main.java:3: error: class, interface, or enum expected
	file.open("test.txt", ios::in);
	^
Main.java:5: error: class, interface, or enum expected
	if (plik.is_open()) {
	^
Main.java:7: error: class, interface, or enum expected
		int k;
		^
Main.java:8: error: class, interface, or enum expected
		file>> k;
		^
Main.java:9: error: class, interface, or enum expected
		std::cout << k << "\n";
		^
Main.java:10: error: class, interface, or enum expected
	}
	^
Main.java:14: error: class, interface, or enum expected
	file.close();
	^
Main.java:15: error: class, interface, or enum expected
	system("pause");
	^
Main.java:16: error: class, interface, or enum expected
	return 0;
	^
Main.java:17: error: class, interface, or enum expected
}
^
12 errors

Standard output is empty