急~！！编个小程序！！

/**
/*@author lkr4878
*/

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Students implements java.io.Serializable {

private String a;
private String b;
private String c;

private int sore(String a, String b, String c) {
int all = 0;
int aa = Integer.valueOf(a).intValue();
int bb = Integer.valueOf(b).intValue();
int cc = Integer.valueOf(c).intValue();
all = aa + bb + cc;
return all;

}

private int svr(String a, String b, String c) {
int svr = 0;
int aa = Integer.valueOf(a).intValue();
int bb = Integer.valueOf(b).intValue();
int cc = Integer.valueOf(c).intValue();
svr = (aa + bb + cc) / 3;
return svr;

}

public static void main(String[] args) {
Students students = new Students();
int n = 0;
System.out.pr