CODEWITHSUNDEEP
c++vector
January
January

Reputation: 27

about the vector.push_back

I wrote a program as follows:

if(i = 0)
{   vector<int> data;
    vector<int>::iterator it;
    data.push_back(2);
    data.push_back(3);
    sort(data.begin(),data.end());
    it = data.begin();
}

if(i = 0)
{   vector<int> data;
    vector<int>::iterator it;
    data.push_back(5);
    data.push_back(1);
    sort(data.begin(),data.end());
    it = data.begin();
}

If I use the vector<int> two times, will it release automatically? Should I release the memory?

Upvotes: 0

Views: 58

Answers (1)

Acha Bill
Acha Bill

Reputation: 1255

Memory allocation for local variables is deleted automatically when the variable goes out of scope.

if(i == 0)
{
    std::vector<int> data; //local variable
}
//allocation for 'data' is deleted automatically
if(i == 0)
{
    std::vector<int> data; //this is not the same vector as above
    //in fact, the vector above no longer exists at this point
}
//allocation for 'data' is deleted automatically

Upvotes: 4

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