average.java

java学习的一些运行实例！我觉得瞒有用

import java.io.*;
public class average{
  public static void main(String args[]){
    int score[]=new int[30];
    for (int k=0;k<30;k++){
      System.out.print("please input a student's grade:");
      try{
         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
         String s=br.readLine();
         score[k]=Integer.parseInt(s);
      }catch(IOException e){}
    }
    int sum=0;
    for(int k=0;k<30;k++)
      sum+=score[k];
    System.out.println("The average grade is:"+sum/30);
  }
}