PAT(甲级)Practice1001--Java版

1001 A+BFromat

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

 Input Spercification :

Each input file contians one test case.Each case contains a pair of integers a and b where -10^6<a,b>10^6 .The numbers are sparated by a space.

Output Specification:

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

package pat;

import java.util.Scanner;

public class Main {
    private static Scanner sc;
    
    public static void main (String args[]) {
        int a ;
        int b;
        int sum;
        sc=new Scanner (System.in);
        a=sc.nextInt();
        b=sc.nextInt();
        sc.close();
        sum =a+b;
        String Ssum1=""+sum;
        //String Ssum2=String.valueOf(sum);
        System.out.println(Ssum1.length());
        //System.out.println(Ssum2.length());
        //System.out.println(Ssum1.substring(0,Ssum1.length()));
        for(int i=0;i<Ssum1.length();i++)
        {
            //遍历sum结果的所有字符
            System.out.print(Ssum1.substring(i,i+1));
            //在已得到的结果上加上逗号
            //if("-".equals(Ssum1.substring(i,i+1)))
            //    continue;
            if((i+1)%3==Ssum1.length()%3 && i!=Ssum1.length()-1)
                System.out.print(",");    
 
        }        
    }
    
}