x = [] for i in ( 0..2 ) do x[ i ] = Array.new( 3 ) for j in ( 0..2 ) do if i <= j then x[ i ][ j ] = 1 else x[ i ][ j ] = 0 end end end for i in ( 0..2 ) do for j in ( 0..2 ) do printf( "%d " , x[ i ][ j ] ) end printf( "\n" ); end