remove first element from vector c++
// Deletes the first element from vector v
v.erase(v.begin());remove first element from vector c++
// Deletes the first element from vector v
v.erase(v.begin());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;
}Copyright © 2021 Codeinu
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