import java.io.*;
public class Xueshengchengjipaixv
{
  public static void main(String[] args)
   {
     int m=0;
    try{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw=new BufferedWriter(new FileWriter("d:\\a.txt"));
        String s;
        while(true){
        System.out.print("输入姓名:");
        s=br.readLine();
        if(s.length()==0) break;
          bw.write(s);
          bw.newLine();
         System.out.print("输入学号:");
         s=br.readLine();
         bw.write(s);
          bw.newLine();
         System.out.print("输入成绩:");
         s=br.readLine();
         bw.write(s);
          bw.newLine();
          m++;
         }
         br.close();
         bw.close();
         String a[]=new String[m];
           int b[]=new int[m];
           int c[]=new int[m];
           int d[]=new int[m];
        BufferedReader bf=new BufferedReader(new FileReader("d:\\a.txt"));
        int n=0;

 while(true){
            String ss=bf.readLine();
            if(ss==null)
              break;
              a[n]=ss;
              b[n]=Integer.parseInt(bf.readLine());
              c[n]=Integer.parseInt(bf.readLine());
              n++;}
  bf.close();
    int i,j,temp;
      for(i=0;i<m;i++)
        {
            d[i]=i;
        }
       for(i=0;i<m-1;i++)
        {
         for(j=0;j<m-1;j++)
          {
           if(c[j]<c[j+1])
             {
              temp=c[j];
              c[j]=c[j+1];
              c[j+1]=temp;
              temp=d[j];
              d[j]=d[j+1];
              d[j+1]=temp;
             }
          }
        }
 BufferedWriter bw1=new BufferedWriter(new FileWriter("d:\\b.txt"));
        for(i=0;i<m;i++)
          {
            bw1.write(a[d[i]]+"   "+String.valueOf(b[d[i]])+"   "+String.valueOf(c[i]));
            bw1.newLine();
          }
        bw1.close();
        }
    catch (FileNotFoundException fe)
    { System.out.println(fe.toString());}
    catch (IOException ie)
    { System.out.println(ie.toString());}
   }
}

评论