how to insert element in vector c++ code example
Example 1: inserting at start in vector c++
// Inserting at start
vector_name.insert(vector_name.begin(), element_to_be_inserted);
// Inserting after xth element
vector_name.insert(vector_name.begin()+(x-1), element_to_be_inserted);
// Inserting at last
vector_name.push_back(element_to_be_inserted);
Example 2: how to append one vector to another c++
vector<int> a;
vector<int> b;
// Appending the integers of b to the end of a
a.insert(a.end(), b.begin(), b.end());
Example 3: adding element in vector c++
vector_name.push_back(element_to_be_added);
Example 4: add to vector c++
// vector::push_back
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;
}
Example 5: Insert into vector C++
// inserting into a 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// "it" no longer valid, get a new one: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;
}