Eroare de compilare: user.cpp:2: error: '::main' must return 'int' user.cpp: In function 'int main()': user.cpp:3: error: expected unqualified-id before ';' token user.cpp:7: warning: format '%ld' expects type 'long int*', but argument 3 has type 'unsigned int' user.cpp:7: warning: format '%d' expects type 'int*', but argument 4 has type 'int' user.cpp:8: warning: comparison between signed and unsigned integer expressions user.cpp:10: warning: format '%ld' expects type 'long int', but argument 3 has type 'int' user.cpp:11: error: request for member 'close' in 'f', which is of non-class type 'FILE*' user.cpp:11: error: request for member 'close' in 'f', which is of non-class type 'FILE*'