高精度除法

Posted by 磊落 on May 11, 2020

高精度除法

特点

思想

#include <iostream>
#include <algorithm>

using namespace std;


vector<int> div(vector<int> &A, int b, int &r)
{
    vector<int> C;

    r = 0;
    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;
    for (int i = a.size() - 1; i >= 0; i--) A.push_back(a[i] - '0');

    int r;
    auto C = div(A, b, r);
    
    for (int i = C.size() - 1; i >= 0; i--)
    {
        printf("%d", C[i]);
    }

    printf("\n%d", r);

    return 0;
}