Compilare: user.c: In function ‘put’: user.c:15:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!t->c[c])t->c[c]=(T*)calloc(1,sizeof(T)); ^ user.c:15:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:16:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] t=t->c[c]; ^ user.c: In function ‘main’: user.c:40:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(t->c[c])t=t->c[c];else break; ^ user.c:40:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:26:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("carte.in","r",stdin); ^ user.c:27:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("carte.out","w",stdout); ^ user.c:30:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i",&t); ^ user.c:32:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s%i",S,&n); ^ user.c:33:23: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] fr(i,0,n)scanf("%s",s),put(s); ^