Borderou de evaluare (job #567439)

Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:16:1: error: ‘cin’ was not declared in this scope user.cpp:16:8: error: ‘cer’ was not declared in this scope user.cpp:16:15: error: ‘k’ was not declared in this scope user.cpp:21:1: error: ‘idk’ was not declared in this scope user.cpp:26:4: error: ‘nr’ was not declared in this scope user.cpp:27:5: error: ‘e’ was not declared in this scope user.cpp:28:3: error: ‘s’ was not declared in this scope user.cpp:36:1: error: ‘cout’ was not declared in this scope user.cpp:36:9: error: ‘s’ was not declared in this scope user.cpp:37:1: error: expected ‘}’ at end of input