Compilare: user.cpp: In function ‘int appearance(int, char*)’: user.cpp:80:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int lenght_prefix(int, char*, int)’: user.cpp:98:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:105:19: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(word); ^ user.cpp: In function ‘void insert_w(int, char*)’: user.cpp:39:26: warning: ‘bro’ may be used uninitialized in this function [-Wmaybe-uninitialized] else T[bro].b = N; ^ /tmp/ccs49iSF.o: In function `main': user.cpp:(.text.startup+0x60): warning: the `gets' function is dangerous and should not be used.