求大佬

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string x1,x2;
	int len,m=0;
	cin>>x1>>x2;
	len=(x1.length()>=x2.length())?x1.length():x2.length();
	len++;
	int a1[len],a2[len];
	memset(a1,0,sizeof(a1));
	memset(a2,0,sizeof(a2));
	for(int i=len-1;i>=len-x1.length();i--)a1[i]=(int)x1[i]-48;
	for(int j=len-1;j>=len-x2.length();j--)a2[j]=(int)x2[j]-48;
	for(int k=len-1;k>=0;k--)
	{
		a1[k]=a1[k]+a2[k]+m;
		m=a1[k]/10;
	}
	if(a1[0]==0)for(int h=1;h<len;h++)cout<<a1[h];
	else for(int h=0;h<len;h++)cout<<a1[h];
	return 0;
}