PAT甲级1001JAVA答案

PAT甲级1001JAVA解析

废话不说，直接上题。

import java.io.*;
public class Main {
 public static void cal() throws IOException {
 	BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in));
   	String[] strArr = buffer.readLine().split(" ");
   	int a = Integer.parseInt(strArr[0]);
   	int b = Integer.parseInt(strArr[1]);
   	char[] result = String.valueOf(a + b).toCharArray();
   	if(result.length>3) {
     	for(int i = 0;i<result.length;i++) {
       		if((result.length-(i+1))%3==0&&i!=result.length-1&&result[i]!='-') {
         	System.out.print(result[i]);
         	System.out.print(",");
       }else {
         	System.out.print(result[i]);
       }
     }
  	}else {
     	for(int i=0;i<result.length;i++)
       	System.out.print(result[i]);
  	}
 }
 public static void main(String[] args) throws IOException {
   	cal();
 }
}