CODEWITHSUNDEEP
c++vectortypes
Chani
Chani

Reputation: 5175

How to use a generic vector in c++

I need a vector that can store int's or float's or string's or char's or any other primitive data type inside itself.

How can I declare such a datatype ?

For example, if I use std::vector<int> vIntVector; vIntVector is only capable of storing integers, not std::string's or floats.

P.S. I do not have C++11 support

Upvotes: 1

Views: 636

Answers (2)

Sat
Sat

Reputation: 1435

Well, as I understood, u just want an array to store variable of different types. Unfortunately there is no simple way to do it in C++. I can suggest you the following solution.

struct Var{
   enum {INT, FLOAT, BYTE} type;
   union{
      int integer;
      float decimal;
      unsigned char byte;
   };
   Var(int v):type(INT), integer(v){}
   Var(float v):type(FLOAT), decimal(v){}
   Var(unsigned char v):type(BYTE), byte(v){}
};

...
std::vector<Var> arr;
arr.push_back(1); // Push integer
arr.push_back(12.f); // Push float
arr.push_back('a'); // Push char(byte)

But I'd recommend you to not use this. Try to think about other way to implement what you need.

Upvotes: 1

Sarfaraz Nawaz
Sarfaraz Nawaz

Reputation: 361692

You could use Boost.Variant if you know the possible types already. Else use Boost.Any.

If you cannot use Boost, may be because it is too huge, then still use it!

If you still don't want to use it, see their implementation, learn from them and then define your own classes.

Upvotes: 10

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