从键盘输入n的值 参考一下 int n; InputStreamReader ir; BufferedReader in; ir = new InputStreamReader(System.in); in = new BufferedReader(ir); System.out.println("Input n is:"); String s = in.readLine(); n = Integer.parseInt(s);
import java.util.*; pubilc class Example { public static void main(string args[]) { Scanner read=new Scanner(System.in); double sum=0; int m=0; while(read.hasNextDouble()) { double x=read.NextDouble(); m=m+1; sum=sum+x; } System.out.printf("%d个数的总和为:%f\n",m,sum); System.out.printf("%d个数的平均值为:%f",m,sum/m); } }
import java.util.Scanner; .... Scanner in = new Scanner(System.in); System.out.println("请输入数字:"); int num = in.nextInt();
Scanner s = new Scanner(System.in); System.out.println("请从键盘输入:"); String str = s.nextLine().toString(); System.out.println("你输入了:" + str); System.exit(0);
InputStreamReader ir;
BufferedReader in;
ir = new InputStreamReader(System.in);
in = new BufferedReader(ir);
System.out.println("Input n is:");
String s = in.readLine();
n = Integer.parseInt(s);
import java.util.*;
pubilc class Example
{
public static void main(string args[])
{
Scanner read=new Scanner(System.in);
double sum=0;
int m=0;
while(read.hasNextDouble())
{
double x=read.NextDouble();
m=m+1;
sum=sum+x;
}
System.out.printf("%d个数的总和为:%f\n",m,sum);
System.out.printf("%d个数的平均值为:%f",m,sum/m);
}
}
import java.util.Scanner;
....
Scanner in = new Scanner(System.in);
System.out.println("请输入数字:");
int num = in.nextInt();
Scanner s = new Scanner(System.in);
System.out.println("请从键盘输入:");
String str = s.nextLine().toString();
System.out.println("你输入了:" + str);
System.exit(0);