PAT:1001. A+B Format (20)

时间限制

400 ms

内存限制

65536 kB

代码长度限制

16000 B

判题程序

Standard

作者

CHEN, Yue

Calculate a + b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less than four digits).

Input

Each input file contains one test case. Each case contains a pair of integers a and b where -1000000 <= a, b <= 1000000. The numbers are separated by a space.

Output

For each test case, you should output the sum of a and b in one line. The sum must be written in the standard format.

Sample Input

-1000000 9

Sample Output

-999,991

import java.io.BufferedInputStream;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.FileNotFoundException;
class ABFormat 
{
public static void main(String[] args) 
{
String lineTxt = null;
try{
 
 String filePath="C:\\Users\\Administrator\\Desktop\\实验课\\PAT_Jdk\\input.txt";
 File file = new File(filePath);
 if(file.isFile() && file.exists()){ //判断文件是否存在
                    
             BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
                    
             lineTxt = bufferedReader.readLine();
}
 
}     catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
String[] line=lineTxt.split(" ");
if(line.length>2){
System.out.println("the file is wrong");
System.exit(1);
}
 long A=Integer.valueOf(line[0]);
 System.out.printf("the A is %d",A);
 long B=Integer.valueOf(line[1]);
      System.out.printf("the B is %d",B);
      long sum=A+B;
 System.out.printf("the sum is %d",sum);
 String sum_str=String.valueOf(sum);
 System.out.println("the sum is "+sum_str);
 int len=sum_str.length();
 
 int i=len-1;
 String tmp="";
      System.out.printf("the tmp.len is %d",tmp.length());
 while(i>=0)
 {
           
tmp=sum_str.charAt(i)+tmp;
i--;
System.out.println("the tmp is"+tmp);
if(sum_str.charAt(i)!='-'){


if(tmp.length()%3==0){
System.out.printf("the tmp.len in if is %d",tmp.length());
                 tmp=","+tmp;
}
  }
  else{
  break;
  }

 }
     System.out.println("the answer is"+tmp);
}
}