Compilare: user.cpp: In function ‘int VSD()’: user.cpp:30: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:70: warning: comparison between signed and unsigned integer expressions user.cpp:77: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int VSD()’: user.cpp:29: warning: ‘n’ may be used uninitialized in this function