how to create a vector in c++
// First include the vector library:
#include <vector>
// The syntax to create a vector looks like this:
std::vector<type> name;
// We can create & initialize "lol" vector with specific values:
std::vector<double> lol = {66.666, -420.69};
// it would look like this: 66.666 | -420.69C++ Vector clear syntax
vector<T>().swap(x); // clear x reallocatingC++ Vector clear
// clearing vectors
#include <iostream>
#include <vector>
int main ()
{
std::vector<int> myvector;
myvector.push_back (100);
myvector.push_back (200);
myvector.push_back (300);
std::cout << "myvector contains:";
for (unsigned i=0; i<myvector.size(); i++)
std::cout << ' ' << myvector[i];
std::cout << '\n';
myvector.clear();
myvector.push_back (1101);
myvector.push_back (2202);
std::cout << "myvector contains:";
for (unsigned i=0; i<myvector.size(); i++)
std::cout << ' ' << myvector[i];
std::cout << '\n';
return 0;
}clear vs erase vector c++
//Syntax
vectorname.clear()
vectorname.erase(startingposition, endingposition)
clear() removes all the elements from a vector container, thus making its
size 0. All the elements of the vector are removed using clear() function.
erase() function, on the other hand, is used to remove specific elements from
the container or a range of elements from the container, thus reducing its
size by the number of elements removed.Copyright © 2021 Codeinu
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