Question

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

Answer 1

#include <iostream>
#include <list>

void printList(std::list<int> const &l) {
    for (auto const &n: l) {
        std::cout << n << " ";
    }
}

int main() {
    std::list<int> l = { 5, 2, 7, 1, 9, 3, 6, 4 };
    
    l.erase(prev(l.end()));
    
    printList(l);
}



/*
run:

5 2 7 1 9 3 6 

*/

 

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Answer 2

#include <iostream>
#include <list>

void printList(std::list<int> const &l) {
    for (auto const &n: l) {
        std::cout << n << " ";
    }
}

int main() {
    std::list<int> l = { 5, 2, 7, 1, 9, 3, 6, 4 };
    
    l.pop_back();
    
    printList(l);
}



/*
run:

5 2 7 1 9 3 6 

*/

 

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Answer 3

#include <iostream>
#include <list>
 
void printList(std::list<int> const &l) {
    for (auto const &n: l) {
        std::cout << n << " ";
    }
}
 
int main() {
    std::list<int> l = { 5, 2, 7, 1, 9, 3, 6, 4 };
     
    std::list<int>::iterator it;
 
    it = l.end(); 
 
    l.erase(--it);
 
    printList(l);
}
 
 
 
/*
run:
 
5 2 7 1 9 3 6 
 
*/

 

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