Compilare: user.cpp: In function ‘int main()’: user.cpp:53:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] lung[l][c]=lung[cl[b]][cc[b]]+1; ^ user.cpp:53:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] lung[l][c]=lung[cl[b]][cc[b]]+1; ^ user.cpp:60:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] lmin=lung[cl[b]][cc[b]]; ^ user.cpp:60:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] lmin=lung[cl[b]][cc[b]]; ^ user.cpp:24:9: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] char a; ^ user.cpp:27:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&m); ^