Compilare: user.cpp: In function ‘int main()’: user.cpp:33:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[m[i][j+1]],++v[m[i][j-1]],++v[m[i-1][j]],++v[m[i+1][j]],++v[m[i-1][j+1]],++v[m[i-1][j-1]],++v[m[i+1][j+1]],++v[m[i+1][j-1]]; ^ user.cpp:33:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[m[i][j+1]],++v[m[i][j-1]],++v[m[i-1][j]],++v[m[i+1][j]],++v[m[i-1][j+1]],++v[m[i-1][j-1]],++v[m[i+1][j+1]],++v[m[i+1][j-1]]; ^ user.cpp:33:60: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[m[i][j+1]],++v[m[i][j-1]],++v[m[i-1][j]],++v[m[i+1][j]],++v[m[i-1][j+1]],++v[m[i-1][j-1]],++v[m[i+1][j+1]],++v[m[i+1][j-1]]; ^ user.cpp:33:75: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[m[i][j+1]],++v[m[i][j-1]],++v[m[i-1][j]],++v[m[i+1][j]],++v[m[i-1][j+1]],++v[m[i-1][j-1]],++v[m[i+1][j+1]],++v[m[i+1][j-1]]; ^ user.cpp:33:92: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[m[i][j+1]],++v[m[i][j-1]],++v[m[i-1][j]],++v[m[i+1][j]],++v[m[i-1][j+1]],++v[m[i-1][j-1]],++v[m[i+1][j+1]],++v[m[i+1][j-1]]; ^ user.cpp:33:109: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[m[i][j+1]],++v[m[i][j-1]],++v[m[i-1][j]],++v[m[i+1][j]],++v[m[i-1][j+1]],++v[m[i-1][j-1]],++v[m[i+1][j+1]],++v[m[i+1][j-1]]; ^ user.cpp:33:126: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[m[i][j+1]],++v[m[i][j-1]],++v[m[i-1][j]],++v[m[i+1][j]],++v[m[i-1][j+1]],++v[m[i-1][j-1]],++v[m[i+1][j+1]],++v[m[i+1][j-1]]; ^ user.cpp:33:143: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++v[m[i][j+1]],++v[m[i][j-1]],++v[m[i-1][j]],++v[m[i+1][j]],++v[m[i-1][j+1]],++v[m[i-1][j-1]],++v[m[i+1][j+1]],++v[m[i+1][j-1]]; ^ user.cpp:21:25: warning: variable ‘o’ set but not used [-Wunused-but-set-variable] int n,mc,k,i,j;char o; ^ user.cpp:26:28: warning: unused variable ‘b’ [-Wunused-variable] bool pp=true,l;int a=0,b=a;int jj=1; ^