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 insrt(char*)': user.cpp:27: warning: control reaches end of non-void function /tmp/ccvJGnR8.o: In function `read()': user.cpp:(.text+0x71): warning: the `gets' function is dangerous and should not be used.