2.6
求一整数个位数之和
import java.util.Scanner;
public class NumberSum
{
public static void main(String[] args)
{
int a,b,c,sum=0;
Scanner input =new Scanner(System.in);
System.out.print("Enter a number between 0 and 1000:");
int number=input.nextInt();
a=number/100;
b=(number%100)/10;
c=(number%100)%10;
sum=a+b+c;
System.out.println("The sum of the digits is"+" "+sum);
}
}
2.15
两点之间的距离
import java.util.Scanner;
public class P {
public static void main(String[] args){
Scanner input=new Scanner(System.in);
System.out.print(“Enter x1 and y1:");
double x1=input.nextDouble();
double y1=input.nextDouble();
System.out.print(“Enter x2 and y2:”)
double x2=input.next0ouble();
double y2=input.nextDouble();
double a=Math.pow(x2-x1, 2)+Math.pow(y2-y1,2);
double distance=Math.pow(a,0.5);
System.out.println(”The distance of the two points is ”十distance);
}
}