算法题：取近似值

1.

public static void main(String[] args) { Scanner sc = new Scanner(System.in); while(sc.hasNextDouble()){ double l=sc.nextDouble(); System.out.println(Math.round(l)); } } Math.round()四舍五入

2.

private static void mthod2(){ Scanner scan = new Scanner(System.in); while(scan.hasNext()){ double d = scan.nextDouble(); int dint = (int)d; if((d-dint)>=0.5 && (d-dint)<1) dint++; System.out.println(dint); } }