作业1

Posted 2020-10-06

1.2 

public class welcome
{
public static void main(String[] args){
System.out.println("Welcome to java!");
System.out.println("Welcome to java!");
System.out.println("Welcome to java!");
System.out.println("Welcome to java!");
System.out.println("Welcome to java!");}

}

 

1.8 

public class Main {

    public static void main(String args[]) {

        Scanner sc = new Scanner(System.in);

        System.out.print("半径为5.5");

        int r = sc.nextInt();

        sc.close();

        double s = Math.PI * 5.5 * r;

        double c = Math.PI * 5.5 * 2;

        System.out.println("圆的面积：" + s + "，圆的周长：" + c);

    }

}

1.12

	public double getAvg(double time,double len){

		double hour = time/60;
		double _len = len/1.6;
		double avg = _len/hour;
		return avg;
	}