Question

How to increase the capacity of a vector in C++

Answer 1

#include <iostream>
#include <vector>
 
int main ()
{
    std::vector<int> v = { 5, 2, 7, 1, 9, 4 };

    std::cout << v.capacity() << "\n";
    std::cout << v.size() << "\n";
    
    v.reserve(50);
    
    std::cout << v.capacity() << "\n";
    std::cout << v.size() << "\n";
    
    return 0;
}
  
  
  
  
/*
run:

6
6
50
6
   
*/

 

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