JAVA学习日报 7.25

今天就是应对大数类了的time了

代码如下：

package shikutai;
import java.io.*;

class BigInt 

{

 int a[];

 int len;

 BigInt(String str)

 {

 {

  len=str.length();

  a=new int[len];

  for(int i=0;i<len;i++) 

  {

   this.a[i]=str.charAt(i)-48;

  }

 }

 }

 public BigInt bigplus(BigInt b) 

 {

  BigInt sum;

  int l;

  int m=len-1;

  int n=b.len-1;

  int max;

  if(len>=b.len)

  {

   l=b.len;

   max=len-1;

   sum=this;

  }

  else

  {

   l=len;

   sum=b;

   max=b.len-1;

  }

  for(int i=0;i<l;i++) 

  {

    sum.a[max]=a[m]+b.a[n];

    if(max!=0&&sum.a[max]>=10)

    {

     sum.a[max]=sum.a[max]-10;

     sum.a[max-1]++;

 

    }

    m--;

    n--;

    max--;

 

  }

  return sum;

  }

  public void output()

  {

 for(int i=0;i<len;i++)

 {

 

  System.out.print(a[i]);

 

 }  

  }

}

public class Class6

{

 public static void main(String[] args) throws IOException

 

 {

String str1;

String str2;

System.out.println("请输入大数1:");

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

str1=br.readLine();

System.out.println("请输入大数2:");

BufferedReader br1=new BufferedReader(new InputStreamReader(System.in));

str2=br1.readLine();

 


 BigInt a1=new BigInt(str1);

 BigInt a2=new BigInt(str2);

 BigInt a3=a1.bigplus(a2);

      a3.output();

 }

}

运行结果：