Compilare: user.cpp: In function ‘int main()’: user.cpp:32:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] l=lmax[c]+1; ^ user.cpp:33:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[i]=pmax[c]; ^ user.cpp:34:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(l>lmax[d]) { ^ user.cpp:35:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] lmax[d]=l; ^ user.cpp:36:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] pmax[d]=i; ^ user.cpp:20:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",a); ^ user.cpp:24:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",a); ^