CODEWITHSUNDEEP
c++arraysstructoverloading
D. Swanke
D. Swanke

Reputation: 29

Directly access element of a structure

Is it possible to make a structure mimic one of its elements? Example:

struct example_struct
{
  double x[2];
  double operator[](int i){return x[i];};
}
struct example_struct var;

Now, assuming var.x has somehow been initialised, expressions like std::cout<<var[1]; clearly work, but what should I do to make expressions like var[1]=3; work?

Upvotes: 0

Views: 56

Answers (1)

lcs
lcs

Reputation: 4255

You need to return a reference, not a copy in order for var[1]=3 to work.

struct example_struct
{
   double x[2];
   double& operator[](int i) return x[i];};
}

Upvotes: 4

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