Compilare: user.c: In function ‘main’: user.c:41:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] mat[h][l][c]=mat[coh[in]][col[in]][coc[in]]+1; ^ user.c:41:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:41:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:11:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&n,&m); ^ user.c:12:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d%d%d%d" ,&hs,&ls,&cs,&hc,&lc,&cc); ^ user.c:14:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d" ,&h,&l,&c); ^