Driver code
public static void main ( String ars [ ] ) { int in [ ] = { 4 , 2 , 5 , 1 , 3 , 6 } ; int pre [ ] = { 1 , 2 , 4 , 5 , 3 , 6 } ; int len = in . length ; PrintPost tree = new PrintPost ( ) ; tree . printPost ( in , pre , 0 , len - 1 ) ; } }