AcWing 794. 高精度除法

#include <bits/stdc++.h>
using namespace std;
vector<int> div(vector<int> &A,int b,int &r){
    vector<int> C;
    for(int i=A.size()-1;i>=0;i--){
        r=r*10+A[i];
        C.push_back(r/b);
        r%=b;
    }
    reverse(C.begin(),C.end());
    while(C.size()>1 && C.back()==0) C.pop_back();
    return C;
}
int main(){
    string a;
    int b;
    cin>>a>>b;
    vector<int> A,C;
    for(int i=a.size()-1;i>=0;i--) A.push_back(a[i]-‘0‘);
    int r=0;
    C=div(A,b,r);
    for(int i=C.size()-1;i>=0;i--) printf("%d",C[i]);
    cout<<endl<<r;
    return 0;
}