ใครเก่ง C++ ช่วยหน่อยครับ ด่วนมากกกกกก

using namespace std;

void InputPolynomailCoefficients( vector< complex< double > > &p, const int maxDegree );
void PolynomailMultiply( const vector< complex< double > > &p1, const vector< complex< double > > &p2, vector< complex< double > > &x );
void DisplayPolynomail( const vector< complex< double > > &p );

int main()
{
    int n1;
    cout << "Max degree of polynomail 1 : ";
    
    
    vector< complex< double > > c1;
    InputPolynomailCoefficients( c1, n1 );
    DisplayPolynomail( c1 );

    int n2;
    cout << "Max degree of polynomail 2 : ";
    
    
    vector< complex< double > > c2;
    InputPolynomailCoefficients( c2, n2 );
    DisplayPolynomail( c2 );

    vector< complex< double> > m;
    PolynomailMultiply( c1, c2, m );
    DisplayPolynomail( m );

    return 0;
}

void InputPolynomailCoefficients( vector< complex< double > > &p, const int maxDegree )
{
    cout << "Input coefficient vector p in term of p(n)*x^n + p(n-1)*x^(n-1) + ... + p(1)*x + p(0)" << endl;
    p.resize(            );
    for( int i =        ; i >= 0; i = i - 1 )
    {
        cout << "p(" << i << ") : ";
        
        
    }
}

void PolynomailMultiply( const vector< complex< double > > &p1, const vector< complex< double > > &p2, vector< complex< double > > &x )
{
    x.resize( p1.size() + p2.size() - 1, complex<double> (0,0) );
    
    
    
    
    
    
    
}

void DisplayPolynomail( const vector< complex< double > > &p )
{
    cout << endl << "Equation : ";
    for( int i = p.size() - 1; i > 1; i = i - 1 )
    {
        cout << p << "x^" << i << " + ";
    }
    cout << p[1] << "*x + " << p[0] << endl << endl;
}

ช่วยเติมโค้ตที่หายไปให้หน่อยครับ
ผมสอบอยู่ครับ  TT