Borderou de evaluare (job #489541)

Eroare de compilare: user.cpp:11:14: warning: multi-character character constant [-Wmultichar] user.cpp:25:11: warning: multi-character character constant [-Wmultichar] user.cpp: In function 'int main()': user.cpp:7:17: error: variable 'std::ifstream cin' has initializer but incomplete type user.cpp:8:18: error: variable 'std::ofstream cout' has initializer but incomplete type user.cpp:12:19: error: 'nr' was not declared in this scope user.cpp:14:5: error: 'x' was not declared in this scope user.cpp:24:5: error: 'nr' was not declared in this scope