高精度加法

#include<iostream>
#include<vector>using namespace std;vector<int> add(vector<int>& A,vector<int>& B){if(A.size()<B.size())   return add(B,A);vector<int> C;int t = 0;for(int i=0;i<A.size();i++){t+=A[i];if(i<B.size())  t+=B[i];C.push_back(t%10);t/=10;}if(t)   C.push_back(t);return C;
}int main(){string a,b;cin>>a>>b;vector<int> A;vector<int> B;for(int i=a.size()-1;i>=0;i--)  A.push_back(a[i]-'0');for(int i=b.size()-1;i>=0;i--)  B.push_back(b[i]-'0');auto C = add(A,B);for(int i=C.size()-1;i>=0;i--)  cout<<C[i];return 0;
}