重修後第七次作業－老人家的舊書房

不知為啥函數居然會跟BufferedReader衝...，要讓函數過只能把函數放在throws IOException之上囧所以乾脆用比較習慣的物件來寫了

然後果然又有幾個for被卡了，懶得改了（茶）

import java.io.*;

class ste{
static long[] mul(long n,String as){
  long[] a = new long[as.length()];
  long[] b = new long[a.length*2];
  for(int i=0;i<as.length();i++){
   a[i] = n%10;
   n /= 10;
  }
  for(int x=0;x<a.length;x++)
   for(int y=0;y<a.length;y++)
    b[x+y] += a[x]*a[y];
  for(int i=0;i<b.length-1;i++){
   long temp = b[i];
   b[i] %= 10;
   b[i+1] = b[i+1]+temp/10;
  }
  return b;
}
}
public class homework9458050_7{
public static void main(String[] alio)
throws IOException{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("請輸入n值：");
String as = br.readLine();
long n = Long.parseLong(as);
long[] st = ste.mul(n,as);
System.out.println("n平方為：");
    if(st[st.length-1] != 0)
     System.out.print(st[st.length-1]);
  for(int i=st.length-2;i>=0;i--)
  System.out.print(st[i]);
  System.out.println();
}
}