秦九韶计算多项式

#include <iostream>
using namespace std;

double JiuShao(double x);

int main(int argc, const char * argv[]) {
    double x;
    cout<<"输入x"<<endl;
    cin>>x;
    double re;
    re = JiuShao(x);
    cout<<re<<endl;
    return 0;
}

double JiuShao(double x){
    int n;
    cin>>n;
    double a[n];
    for (int i = 0; i <= n - 1; ++i) {
        cin>>a[i];
    }
    double v = a[n-1];
    int k = 1;
    for (; k != n; ++k) {
        v = x * v + a[n - 1 - k];
    }
    return v;
}