Eroare de compilare: user.cpp:1:20: error: fstream.h: No such file or directory user.cpp:4: error: ‘ifstream’ does not name a type user.cpp:5: error: ‘ofstream’ does not name a type user.cpp: In function ‘void cit()’: user.cpp:15: error: ‘x’ was not declared in this scope user.cpp:17: error: ‘y’ was not declared in this scope user.cpp:19: error: ‘y’ was not declared in this scope user.cpp: In function ‘void diag()’: user.cpp:28: error: ‘y’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:40: error: ‘x’ was not declared in this scope user.cpp:47: error: ‘y’ was not declared in this scope