insert at position in vector c++
// where v is the vector to insert, i is
// the position, and value is the value
v.insert(v.begin() + i, v2[i])insert at position in vector c++
// where v is the vector to insert, i is
// the position, and value is the value
v.insert(v.begin() + i, v2[i])how to create a vector in c++
// CPP program to create an empty vector
// and push values one by one.
#include <vector>
using namespace std;
int main()
{
// Create an empty vector
vector<int> vect;
//add/push an integer to the end of the vector
vect.push_back(10);
//to traverse and print the vector from start to finish
for (int x : vect)
cout << x << " ";
return 0;
}adding element in vector c++
vector_name.push_back(element_to_be_added);add to vector c++
// vector::push_back
#include <iostream>
#include <vector>
int main ()
{
std::vector<int> myvector;
int myint;
std::cout << "Please enter some integers (enter 0 to end):\n";
do {
std::cin >> myint;
myvector.push_back (myint);
} while (myint);
std::cout << "myvector stores " << int(myvector.size()) << " numbers.\n";
return 0;
}Insert into vector C++
// inserting into a vector
#include <iostream>
#include <vector>
int main ()
{
std::vector<int> myvector (3,100);
std::vector<int>::iterator it;
it = myvector.begin();
it = myvector.insert ( it , 200 );
myvector.insert (it,2,300);
// "it" no longer valid, get a new one:
it = myvector.begin();
std::vector<int> anothervector (2,400);
myvector.insert (it+2,anothervector.begin(),anothervector.end());
int myarray [] = { 501,502,503 };
myvector.insert (myvector.begin(), myarray, myarray+3);
std::cout << "myvector contains:";
for (it=myvector.begin(); it<myvector.end(); it++)
std::cout << ' ' << *it;
std::cout << '\n';
return 0;
}insert vector
#include <iostream>
#include <vector>
void print_vec(const std::vector<int>& vec)
{
for (auto x: vec) {
std::cout << ' ' << x;
}
std::cout << '\n';
}
int main ()
{
std::vector<int> vec(3,100);
print_vec(vec);
auto it = vec.begin();
it = vec.insert(it, 200);
print_vec(vec);
vec.insert(it,2,300);
print_vec(vec);
// "it" no longer valid, get a new one:
it = vec.begin();
std::vector<int> vec2(2,400);
vec.insert(it+2, vec2.begin(), vec2.end());
print_vec(vec);
int arr[] = { 501,502,503 };
vec.insert(vec.begin(), arr, arr+3);
print_vec(vec);
}Copyright © 2021 Codeinu
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