erase in vector cpp code example
Example 1: remove element by index from vector c++
vec.erase(vec.begin() + 1);
vec.erase(vec.begin() + 1, vec.begin() + 3);
Example 2: remove value from vector c++
#include <algorithm>
#include <vector>
std::vector<int> vec {2, 4, 6, 8};
int value = 8
vec.erase(std::remove(vec.begin(), vec.end(), value), vec.end());
Example 3: how to delete an element in vector pair in cpp
#include <iostream>
#include <utility>
#include <vector>
using namespace std;
int main()
{
vector< pair<int, int> > v;
int N = 5;
const int threshold = 2;
for(int i = 0; i < N; ++i)
v.push_back(make_pair(i, i));
int i = 0;
while(i < v.size())
if (v[i].second > threshold)
v.erase(v.begin() + i);
else
i++;
for(int i = 0; i < v.size(); ++i)
cout << "(" << v[i].first << ", " << v[i].second << ")\n";
cout << "Done" << endl;
}