高精度除法

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

vector<int> div(vector<int>& A, int& b, int& r)
{
    vector<int> C;
    r = 0;//r为余数
    for (int i = A.size() - 1; i >= 0; i--)
    {
        r = r * 10 + A[i];
        C.push_back(r / b);
        r = r % b;
    }
    reverse(C.begin(), C.end());//交换容器内的元素顺序
    while (C.size() > 1 && C.back() == 0) C.pop_back();
    return C;
}

int main()
{
    string a;
    int b,r;
    cin >> a >> b;
    vector<int> A;
    for (int i = a.size() - 1; i >= 0; i--) A.push_back(a[i] - '0');
    auto C = div(A, b, r);
    for (int i = C.size() - 1; i >= 0; i--) cout << C[i];
    cout << endl << r << endl;
    return 0;
}