Compilare: user.cpp: In function ‘void insert(int, int)’: user.cpp:69:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(tm->po[in[j]]==NULL) ^ user.cpp:71:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm->po[in[j]]=new nod(); ^ user.cpp:72:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm->po[in[j]]->tata=tm; ^ user.cpp:73:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm->po[in[j]]->ch=in[j]; ^ user.cpp:74:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm->po[in[j]]->lv=tm->lv+1; ^ user.cpp:76:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm=tm->po[in[j]]; ^ user.cpp: In function ‘int main()’: user.cpp:85:17: warning: unused variable ‘l’ [-Wunused-variable] int n,m,i,j,l,x,y,z,ans=0; ^ user.cpp:85:23: warning: unused variable ‘z’ [-Wunused-variable] int n,m,i,j,l,x,y,z,ans=0; ^ user.cpp:83:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strigat.in","r",stdin); ^ user.cpp:84:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strigat.out","w",stdout); ^ user.cpp:88:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n",&n,&m); ^ user.cpp:91:19: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(in+1); ^ user.cpp:93:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&y); ^ user.cpp:139:24: warning: ‘rec’ may be used uninitialized in this function [-Wmaybe-uninitialized] rec=rec->ant[i]; ^ /tmp/ccg0ykDb.o: In function `main': user.cpp:(.text.startup+0xee): warning: the `gets' function is dangerous and should not be used.