CODEWITHSUNDEEP
c++vector
TMNT
TMNT

Reputation: 166

Can a vector hold different data types in two different occasions?

i want a single vector say vector<userdefined> vec to store some values. lets say i have created two objects B and C of class A.

Now i want object B to hold integers in my vector "vec" and object C to hold double in my vector "vec"

An example to illustrate this question

B.vec.pushback(int);
C.vec.pushback(double);

Can i create a template or use any overloading function to do that?

Upvotes: 0

Views: 266

Answers (1)

Weak to Enuma Elish
Weak to Enuma Elish

Reputation: 4637

Forgetting "why" you want to do this, you could store either ints or doubles in the same vector by using unions.

#include <vector>

union userdefined
{
    int i;
    double d;
    userdefined(int p) : i(p) {}
    userdefined(double p) : d(p) {}
};


struct C
{
    std::vector<userdefined> vec;
};

int main()
{
    int i = 0;
    double d = 0.0;
    C A;
    C B;
    A.vec.emplace_back(i);
    B.vec.emplace_back(d);
}

I wouldn't recommend doing this. You should try to find a solution that doesn't require storing two types in the same data structure. It's too easy to access an inactive union member.

Upvotes: 1

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