c++ - Class of dynamic array -

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i've been working on c++ exercise , unable figure out how correctly, let me explain it:

i made class based on 1st question of exercise

class cylinder { private:     float height;     float radius;     char * label; public:     cylinder(float, float, char *);     cylinder();     cylinder(const cylinder &);     ~cylinder(); };

the 2nd question was:

create new class "form3d" contain cylinders (dynamic array of cylinder)

how make default constructor & constructor parameters?

this did:

class forme3d {     cylinder * tab;     int tabsize; public:     forme3d();     forme3d(cylinder * , int);     ~forme3d(); };  forme3d::forme3d(cylindre * c, int t) {     cylindre * tab = new cylindre[t];     (int = 0; < t; ++i)     {         tab[i] = c[i];     } }

this cause error "operator=" not defined line "tab[i] = c[i];"


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