problem 5.2

gistfile1.java

public class TestFloat {
  

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		//System.out.println( "Please input a real number between 0 and 1, 0.72 for example:" );
		
		double v =  1.0 / 3.0;
		int[] a = new int[32];
		
		if ( testFloat( v, a ) ) {
			System.out.print( "0." );
			for ( int i = 0; i < 32; i++ )
				System.out.print( a[ i ] );
			System.out.println();
		}
		else System.out.println( "ERROR" );
		
		System.out.print( "0." );
		for ( int i = 0; i < 32; i++ )
			System.out.print( a[ i ] );
		System.out.println();
	}
	
	public static boolean testFloat( double v, int[] a ) {
		for ( int i = 0; i < 32; i++ ) {
			v = v * 2;
			a[ i ] = ( int ) v;
			v = v - a[ i ];
		}
		if ( v == 0 )
			return true;
		else return false;
	}
}