cc150_5_2.java

public class Q5_2 {
	
	public static void main(String[] args){
		
		System.out.println(ToBinary(0.72,0));
		System.out.println(ToBinary(0.87948723,0));

	}
	
	public static String ToBinary(double current, int bits){
		
		if(current > 1 || current<0){
			return "ERROR";
		}
		

		
		StringBuilder result = new StringBuilder();
		
		if(current == 0.5 && bits < 32) {
			result.append('1');
			
		}
		else if (current > 0.5){
			
			if(bits > 32){
				result.append("Error");

			}
			else {
			result.append("1");
			double temp = (current -0.5)*2;
			String tempstring = ToBinary(temp,bits+1);
			result.append(tempstring);
		
			}
		}
		else{
			
			if(bits > 32){
				result.append("t");
				return result.toString();
			}
			else{
				result.append("0");
				double temp = current*2;
				String tempstring = ToBinary(temp,bits+1);
				result.append(tempstring);
			}
		}
		
		
		if(result.toString().contains("Error")){
			return "Error";
		}
		else{
			String rettemp = result.toString();
			if(rettemp.contains("t")){
				return rettemp.replace("t", "");
			}
			
			else{				
			return rettemp;
			}
		}
			
	}

}