Compilare: user.cpp: In function ‘int main()’: user.cpp:57:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (divider[ j ] % digit[ t ] == 0) ^ user.cpp:58:87: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[ i&1 ][ divider[ j ] ] += d[ (i-1)&1 ][ divider[ j ] / digit[ t ] ]; ^ user.cpp:20:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &a, &b ); ^