Compilare: user.cpp: In function ‘void insert(nod*)’: user.cpp:43:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(tm->po[sin[i][j]]==NULL) ^ user.cpp:45:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm->po[sin[i][j]]=new nod(); ^ user.cpp:46:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm->po[sin[i][j]]->tata=tm; ^ user.cpp:47:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm->po[sin[i][j]]->ch=sin[i][j]; ^ user.cpp:48:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm->po[sin[i][j]]->lv=tm->lv+1; ^ user.cpp:50:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] tm=tm->po[sin[i][j]]; ^ user.cpp: In function ‘int main()’: user.cpp:76:13: warning: unused variable ‘l’ [-Wunused-variable] int i,j,l,x,y,z; ^ user.cpp:76:15: warning: unused variable ‘x’ [-Wunused-variable] int i,j,l,x,y,z; ^ user.cpp:76:17: warning: unused variable ‘y’ [-Wunused-variable] int i,j,l,x,y,z; ^ user.cpp:76:19: warning: unused variable ‘z’ [-Wunused-variable] int i,j,l,x,y,z; ^ user.cpp:77:11: warning: unused variable ‘tm’ [-Wunused-variable] nod * tm; ^ user.cpp:74:36: 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:75:38: 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:79:26: 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:82:19: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(sin[i]+1); ^ user.cpp:86:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&fri[i]); ^