Compilare: user.cpp: In function ‘void Fail()’: user.cpp:86:14: warning: variable ‘leaf’ set but not used [-Wunused-but-set-variable] bool leaf = 1; ^ user.cpp: In function ‘int main()’: user.cpp:139:14: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(Txt); ^ user.cpp:140:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:144:19: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(Word); ^ /tmp/ccGQoUyx.o: In function `main': user.cpp:(.text.startup+0x1f): warning: the `gets' function is dangerous and should not be used.