Eroare de compilare: user.cpp:15: error: expected initializer before numeric constant user.cpp: In function 'void read()': user.cpp:24: error: 'a' was not declared in this scope user.cpp:28: error: 'a' was not declared in this scope user.cpp: In function 'void print()': user.cpp:46: error: 'a' was not declared in this scope user.cpp: In function 'void sol()': user.cpp:57: error: 'a' was not declared in this scope user.cpp: In function 'int main()': user.cpp:92: error: 'a' was not declared in this scope