Compilare: user.cpp: In function ‘int NOT()’: user.cpp:29:53: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if (isalpha(sir[ind])) nr = Litera[sir[ind]], ++ind; ^ user.cpp: In function ‘int SAU()’: user.cpp:42:35: warning: value computed is not used [-Wunused-value] while (sir[ind]=='|') ++ind,nr| SI(); ^ user.cpp: In function ‘int main()’: user.cpp:59:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] Litera[q[i]]^=1; ^ user.cpp:47:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bool.in", "r", stdin); ^ user.cpp:48:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bool.out", "w", stdout); ^ user.cpp:49:14: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s+1); ^ user.cpp:51:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&Q); ^ user.cpp:52:14: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(q+1); ^ /tmp/cc3YS7iW.o: In function `main': user.cpp:(.text.startup+0x53): warning: the `gets' function is dangerous and should not be used.