Compilare: user.cpp:211:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:59: warning: comparison between signed and unsigned integer expressions user.cpp:61: warning: comparison between signed and unsigned integer expressions user.cpp:64: warning: comparison between signed and unsigned integer expressions user.cpp:21: warning: unused variable 'ok' user.cpp: In function 'void add()': user.cpp:117: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void sub()': user.cpp:129: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void multv(std::vector<int, std::allocator<int> >&, std::vector<int, std::allocator<int> >&, std::vector<int, std::allocator<int> >&)': user.cpp:181: warning: comparison between signed and unsigned integer expressions user.cpp:184: warning: comparison between signed and unsigned integer expressions user.cpp:187: warning: comparison between signed and unsigned integer expressions user.cpp:187: warning: comparison between signed and unsigned integer expressions user.cpp:189: warning: comparison between signed and unsigned integer expressions user.cpp:191: warning: comparison between signed and unsigned integer expressions