Compilare: user.cpp: In function ‘void Try_it(char, char, char, long int)’: user.cpp:10:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] r[i][j] = 0; ^ user.cpp:10:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] r[i][j] = 0; ^ user.cpp:11:10: warning: array subscript has type ‘char’ [-Wchar-subscripts] l[pas] = a[i][j]; ^ user.cpp:11:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] l[pas] = a[i][j]; ^ user.cpp:11:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] l[pas] = a[i][j]; ^ user.cpp:12:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum += 1L*pas*a[i][j]; ^ user.cpp:12:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] sum += 1L*pas*a[i][j]; ^ user.cpp:20:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] r[i][j] = 1; ^ user.cpp:20:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] r[i][j] = 1; ^ user.cpp:29:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (r[i-1][j]) Try_it(pas+1,i-1,j,sum); ^ user.cpp:30:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (r[i+1][j]) Try_it(pas+1,i+1,j,sum); ^ user.cpp:31:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (r[i][j-1]) Try_it(pas+1,i,j-1,sum); ^ user.cpp:32:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (r[i][j+1]) Try_it(pas+1,i,j+1,sum); ^ user.cpp:39:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] r[i][j] = 1; ^ user.cpp:39:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] r[i][j] = 1; ^ user.cpp: In function ‘int main()’: user.cpp:44:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma3.in","r",stdin); ^