How to use the pop_back() in C++

[Garrick]

I am working in the XYZ company as software developer. We can use the C++ language for developing the software. Hence, I can not know about the pop_back() function of the C++ language. So, I would like to know about the pop_back() function of the C++ language. I also would like to know about how to the use of the pop_back() function of the C++ language. Can anyone has the solution for me then reply!!!!

[Praetor]

The pop_back() function of the C++ language can be used to delete the last of an element. The pop_back() function can removes the last an element in the given specified vector by an effectively decreasing the size of the vector by 1 and invalidating all of an iterators and references to it. This calls the removed an element's destructor.

[Katty]

The pop_back() function of the C++ can removes an element that can be at the end of the given specified vector. The pop_back() function can be comes under the vector containers. This pop_push() function can be called by the deleted an element's destructor. The following can be the general form of the log10() function of the C++ language :

void pop_back( );

[kelfro]

The following can be an example that can uses the pop_back() function of the C++ language to illustrate the pop_back() function :

#include <vector>
#include <iostream>
int main( )
{
   using namespace std;   
   vector <int> w1;
   w1.push_back( 1 );
   cout << w1.back( ) << endl;
   w1.push_back( 2 );
   cout << w1.back( ) << endl;
   w1.pop_back( );
   cout << w1.back( ) << endl;
}

Output

1
2
1

[Zecho]

The pop_back() function or method can deletes the last an element of the given specified vector. The pop_back() function can be executed in constant time. In the following an example, the elements can be popped out of the given specified vector after they can be added up in the summation function as follows :

#include <iostream>
#include <vector>
using namespace std;
int main ()
{
  vector<int> mvctr;
  int summation (0);
  mvctr.push_back (100);
  mvctr.push_back (200);
  mvctr.push_back (300);
  while (!mvctr.empty())
  {
    summation+=mvctr.back();
    mvctr.pop_back();
  }
  cout << "The elements of mvctr summed " << summation << endl;
  return 0;
}

Output:

The elements of mvctr summed 600