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remove item using reverse iterator C++

Troubled Teira answered on August 22, 2022 Popularity 3/10 Helpfulness 1/10

answer remove item using reverse iterator C++

remove item using reverse iterator C++

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// C++ program to delete an element of a vector
// using erase() and reverse iterator.
  
#include <iostream>
#include <vector>
  
using namespace std;
  
// Function to delete element
// 'num' from vector 'vec'
vector<int> delete_ele(vector<int> vec, int num)
{
    // initializing a reverse iterator
    vector<int>::reverse_iterator itr1;
  
    for (itr1 = vec.rbegin(); itr1 < vec.rend(); itr1++) {
  
        if (*itr1 == num) {
  
            // erasing element = 16
            vec.erase((itr1 + 1).base());
        }
    }
  
    return vec;
}
  
// Driver code
int main()
{
    vector<int> vec = { 1, 4, 7, 10, 13, 16, 19 };
  
    // we want to delete element = 16
    int num = 16;
  
    vector<int>::iterator itr1;
  
    cout << "Vector originally: \n";
    for (itr1 = vec.begin(); itr1 < vec.end(); itr1++) {
  
        // printing the original elements of vector
        cout << *itr1 << " ";
    }
  
    cout << "\n\nElement to be deleted: "
         << num << "\n\n";
  
    // reinitializing vector 'vec'
    // after deleting 'num'
    // from the vector
    // and keeping other remaining
    // elements as they are
    vec = delete_ele(vec, num);
  
    vector<int>::iterator itr2;
  
    cout << "Vector after deletion: \n";
    for (itr2 = vec.begin(); itr2 < vec.end(); itr2++) {
  
        // printing the remaining elements of vector
        cout << *itr2 << " ";
    }
  
    return 0;
}
// This code is contributed by supratik_mitra

Popularity 3/10 Helpfulness 1/10 Language cpp

Source: www.geeksforgeeks.org

Tags: c++ reverse-iterator using

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Contributed on Aug 22 2022

Troubled Teira

0 Answers Avg Quality 2/10

remove item using reverse iterator C++

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