蓝桥杯：基础练习 高精度加法

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main{

	public static void main(String[] args) {
		String sa = "";
		String sb = "";
		int i,j,count;
		int[] a = new int[1000];
		int[] b = new int[1000];
		Scanner sc = new Scanner(System.in);
		sa = sc.nextLine();
		sb = sc.nextLine();
		int saLength = sa.length();
		int sbLength = sb.length();
		for (i = saLength - 1; i >= 0; i--) {
			a[saLength - 1 - i] = Integer.parseInt(sa.substring(i,i + 1));
		}
		for (i = sbLength - 1; i >= 0; i--) {
			b[sbLength - 1 - i] = Integer.parseInt(sb.substring(i,i + 1));
		}
		if (saLength > sbLength) {
			count = saLength;
		} else {
			count = sbLength;
		}
		for (i = 0; i < count; i++) {
			a[i] = a[i] + b[i];
		}
		for (i = 0; i < count; i++) {
			if (a[i] > 9) {
				a[i + 1] = a[i + 1] + a[i] / 10;
				a[i] = a[i] % 10;
			}
		}
		if (a[count] != 0) {
			count = count + 1;
		}
		for (i = count -1; i >= 0; i--) {
			System.out.print(a[i]);
		}
	}
}