Thread: Expression-must-have-pointer-to-object-type

  1. #1
    Registered User
    Join Date
    Jan 2011


    What does the above error mean? I have typdef Coeffs as double and I'm trying to use it in func1
    Line 18: Poly --> expression must have pointer to object type

    typedef double Coeffs;
    int main()
    	Coeffs Poly;
    func1(Coeffs Poly, int num_verts, double*coeff)
    	double A, B, C, D;
    	int i, j;
    	A = B = C = D = 0;
    		j = (i+1) % num_verts;
    		A += ((Poly[j][1] - Poly[i][1]) * (Poly[i][2] + Poly[j][2]));
    		B += ((Poly[j][2] - Poly[i][2]) * (Poly[i][0] + Poly[j][0]));
    		C += ((Poly[j][0] - Poly[i][0]) * (Poly[i][1] + Poly[j][1]));

  2. #2
    C++ Witch laserlight's Avatar
    Join Date
    Oct 2003
    In func1, Poly is a Coeffs, therefore Poly is a double, hence Poly[j][1] does not make sense.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
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