Question

How to remove the last element from a vector in C++

Answer 1

#include <iostream>
#include <vector>
 
void printVector(std::vector<int> const &v) {
    for (auto const &n: v) {
        std::cout << n << " ";
    }
}
  
int main ()
{
    std::vector<int> v = { 5, 2, 7, 1, 9, 3 };
  
    v.erase(prev(v.end()));
    
    printVector(v);
  
    return 0;
}
  
  
  
  
/*
run:
  
5 2 7 1 9 
   
*/

 

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Answer 2

#include <iostream>
#include <vector>
 
void printVector(std::vector<int> const &v) {
    for (auto const &n: v) {
        std::cout << n << " ";
    }
}
  
int main ()
{
    std::vector<int> v = { 5, 2, 7, 1, 9, 3 };
  
    v.pop_back();
    
    printVector(v);
  
    return 0;
}
  
  
  
  
/*
run:
  
5 2 7 1 9 
   
*/

 

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