hw11_17.java

JAVA 2面向对象程序设计(习题参考答案9-17).rar

import java.io.*;
public class hw11_17
{
   public static void main (String args[])throws IOException
   {
      int n,num;
      double sum=0f;
      String str;
      BufferedReader buf;      
      buf = new BufferedReader(new InputStreamReader(System.in));
      System.out.println("计算1^1/2+2^1/2+...n^1/2");
      System.out.print("请输入n值:");
      str = buf.readLine();     
      n= Integer.parseInt(str);
      for(num=1;num<=n;num+=1)
         sum+=Math.sqrt((double)num); 
      System.out.println("其总和为:"+sum);
   }
}