Eroare de compilare: user.cpp: In function ‘std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > > reader(int&, int&)’: user.cpp:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int summer(const std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >&, int, int, int, int, int&)’: user.cpp:51: warning: no return statement in function returning non-void user.cpp: At global scope: user.cpp:53: error: expected constructor, destructor, or type conversion before ‘=’ token user.cpp:55: error: expected unqualified-id before ‘if’ user.cpp:60: error: expected unqualified-id before ‘return’ user.cpp:62: error: expected declaration before ‘}’ token