Compilare: user.cpp: In function 'int verif(char*)': user.cpp:14: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:68: warning: unused variable 'nr' user.cpp: In function 'void eval(char*)': user.cpp:47: warning: 'semn' may be used uninitialized in this function /tmp/ccItlphv.o: In function `main': user.cpp:(.text+0x402): warning: the `gets' function is dangerous and should not be used.