Use the capacity method to determine how many elements the vector is capable of storing before it will resize. - C++ STL

C++ examples for STL:vector

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Description

Use the capacity method to determine how many elements the vector is capable of storing before it will resize.

Demo Code

#include <cinttypes>
#include <iostream>
#include <vector>

using namespace std;

int main(int argc, char* argv[])
{
    vector<int32_t> stlVector{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16};

    cout << "The size is: " << stlVector.size() << endl;
    cout << "The capacity is: " << stlVector.capacity() << endl;

    stlVector.emplace_back(17);//from w ww.  j av  a2 s  . c  om

    cout << "The size is: " << stlVector.size() << endl;
    cout << "The capacity is: " << stlVector.capacity() << endl;

    for (auto&& number : stlVector)
    {
        std::cout << number << std::endl;
    }

    return 0;
}

Result


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