import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner hy = new Scanner(System.in);
double x1,x2,y1,y2;
System.out.println("请键入X1的值:");
x1 = Double.valueOf(hy.nextLine());
System.out.println("请键入X2的值:");
x2 = Double.valueOf(hy.nextLine());
System.out.println("请键入Y1的值:");
y1 = Double.valueOf(hy.nextLine());
System.out.println("请键入Y2的值:");
y2 = Double.valueOf(hy.nextLine());
System.out.println("两个点之间的距离是:" + Math.pow((Math.pow((x2 - x1),2) + Math.pow((y2 - y1),2)),0.5));
}
}
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner hy = new Scanner(System.in);
String hyper;
System.out.println("请输入一个0-1000的整数来求整数各位数的和");
hyper = hy.nextLine();
//方法1
int test = Integer.valueOf(hyper);
if(test > 0 && test <= 1000) {
int a = test % 2;
int b = test / 10;
int c = test / 100;
System.out.println("总和为:" + (a + b + c));
}
else {
System.out.println("不要皮!");
}
//方法2
/*
if(Integer.valueOf(hyper) <= 1000) {
int a = 0;
for (int i = 0; i < hyper.length(); i++) {
a = a + Integer.valueOf(hyper.substring(i, i + 1));
}
System.out.println(a);
}*/
}
}