Eroare de compilare: user.cpp:30:2: warning: no newline at end of file user.cpp:2: error: '::main' must return 'int' user.cpp: In function 'int main()': user.cpp:5: error: expected primary-expression before ',' token user.cpp:6: error: expected `;' before 'char' user.cpp:11: error: 'a' was not declared in this scope user.cpp:16: error: 'a' was not declared in this scope user.cpp:17: error: 'a' was not declared in this scope user.cpp:21: error: 'a' was not declared in this scope