有一处错误不知道怎么改，还有怎么写测试这个函数

Question

题目是
编写一个带默认参数的函数，计算4次多项式的值，并测试该函数

Answer 1

如果函数polynomial的定义没错的话，把main函数的返回类型由void改为int应该就可以了。

修改如下：

参考链接:

https://blog.csdn.net/qq_44575789/article/details/106949804

#include <iostream>

using namespace std;

double polynomial(double,double ,double=0,double=0,double=0,double=0); 

int main(){
    
    double x;
    cout<<"Please enter x:";
    cin>>x;
    
    cout<<"polynomial(x,1)="<<polynomial(x,1)<<endl;
    cout<<"polynomial(x,1,2)="<<polynomial(x,1,2)<<endl;
    cout<<"polynomial(x,1,2,3)="<<polynomial(x,1,2,3)<<endl;
    cout<<"polynomial(x,1,2,3,4)="<<polynomial(x,1,2,3,4)<<endl;
    cout<<"polynomial(x,1,2,3,4,5)="<<polynomial(x,1,2,3,4,5)<<endl;
}

// https://blog.csdn.net/qq_44575789/article/details/106949804
double polynomial(double x,double a0 ,double a1,double a2,double a3,double a4){
    
    return a0*(a1*(a2*(a3*a4*x)*x)*x)*x;
}