vectors in cpp
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#include <iostream>
#include <vector>
/*
Vectors are same as dynamic arrays with the ability to resize itself
automatically when an element is inserted or deleted, with their storage being handled automatically
by the container
*/
using namespace std;
int main() {
cout << "Enter number of elements you want to enter into Vector: ";
int n;
cin >> n;
vector<int> v1 = {1,2,3,6,4};
cout << "The vector is : \n";
for(int i=0; i<v1.size(); ++i){
cout << v1[i] << "\t";
}
// cout << "Another way to print the vector is: \t";
// for(int i= v1.begin(); i
cout << "\nThe ending value of vector v1 is: ";
cout << *(v1.end());
cout << "\nAnother way to Print the vector is: \t";
//cend points to next element of last element in the vector
for(auto i = v1.cbegin(); i!=v1.cend(); ++i){
cout << *i << "\t";
}
vector<int> v2{10,12,123};
fill(v2.begin(),v2.end(),5);
cout << "\nSecond vector is: \t";
for(auto i = v2.cbegin(); i != v2.cend(); ++i){
cout << *i << "\t";
}
cout << "\nPrinting the vector in Reverse order: \t";
for(auto i = v1.rbegin();i != v1.rend(); ++i){
cout << *i << "\t";
}
v1.swap(v2);
cout << "\nElements in vector1 after swapping : \t";
for(auto i = v1.cbegin();i!=v1.cend();++i){
cout << *i << "\t";
}
cout << "\nPrinting cend() by dereferencing : " << *(v1.cend());
cout << "\nPrinting cbegin() by dereferencing : " << *(v1.begin());
cout << "\n\n The capacity of vector1 with 3 elements is: " << v1.capacity();
vector<int> v3;
cout << "\n The capacity of v3 without initializing: " << v3.capacity();
v3.assign({1,2,3});
cout << "\n The capacity of v3 with 3 elements is : " << v3.capacity();
cout << "\n\n The value of rbegin is : " << *(v3.rbegin());
cout << "\n\n The value of rend is : " << *(v3.rend());
return 0;
}
Cpp
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