Compilare: user.cpp: In function 'int insrt(char*)': user.cpp:27: warning: no return statement in function returning non-void user.cpp: In function 'void read()': user.cpp:56: warning: comparison between signed and unsigned integer expressions user.cpp:39: warning: unused variable 'nr' user.cpp: In function 'int main()': user.cpp:103: warning: unused variable 'ok' user.cpp:103: warning: unused variable 'h' user.cpp: In function 'int insrt(char*)': user.cpp:27: warning: control reaches end of non-void function /tmp/cc3B5gTV.o: In function `read()': user.cpp:(.text+0xd1): warning: the `gets' function is dangerous and should not be used.