题解 | #高精度整数加法#

import java.io.*; public class Main{ public static void main(String[] args)throws IOException{ BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String str = null; while((str = in.readLine())!=null){ String str2 = in.readLine(); StringBuilder sb = new StringBuilder(); int count = 0; int i = str.length()-1, j = str2.length() -1; while(i >= 0 && j >= 0){ int temp = str.charAt(i)-'0'+str2.charAt(j)-'0' + count; count = temp /10; temp = temp % 10; sb.append(temp); i--; j--; } while(i >= 0){ int temp = str.charAt(i)-'0' + count; count = temp /10; temp = temp % 10; sb.append(temp); i--; } while(j >= 0){ int temp = str2.charAt(j) - '0'+ count; count = temp /10; temp = temp % 10; sb.append(temp); j--; } if(count > 0 ){ sb.append(count); } System.out.println(sb.reverse().toString()); } } }