Combine insert and end to add elements to the end of vector
#include <iostream>
#include <cassert>
#include <algorithm>
#include <string>
#include <list>
#include <deque>
#include <vector>
using namespace std;
int main()
{
vector<string> vec;
vec.insert(vec.end(), "AAA");
vec.insert(vec.end(), "BBBB");
vec.insert(vec.end(), "CCCCC");
vector<string>::iterator pos;
for (pos=vec.begin(); pos!=vec.end(); ++pos) {
cout << *pos << " ";
}
return 0;
}AAA BBBB CCCCC
Insert 10 duplicate value to vector
#include <iostream>
#include <vector>
using namespace std;
int main()
{
vector<char> v(10);
vector<char> v2;
char str[] = "<Vector>";
unsigned int i;
for(i=0; i<10; i++)
v[i] = i + "a";
for(i=0; str[i]; i++)
v2.push_back(str[i]);
cout << "Original contents of v:\n";
for(i=0; i<v.size(); i++)
cout << v[i] << " ";
cout << "\n\n";
vector<char>::iterator p = v.begin();
p += 2; // point to 3rd element
v.insert(p, 10, "X");
// display contents after insertion
cout << "Size after inserting X"s = " << v.size() << endl;
cout << "Contents after insert:\n";
for(i=0; i<v.size(); i++) cout << v[i] << " ";
cout << "\n\n";
return 0;
}Original contents of v:
a b c d e f g h i j
Size after inserting X"s = 20
Contents after insert:
a b X X X X X X X X X X c d e f g h i j
Insert 25 at the beginning
#include <vector>
#include <iostream>
using namespace std;
int main ()
{
// Instantiate a vector with 4 elements, each initialized to 90
vector <int> v (4, 90);
// Insert 25 at the beginning
v.insert (v.begin (), 25);
vector <int>::iterator i;
for ( i = v.begin (); i != v.end (); ++ i )
{
cout << *i << " ";
}
return 0;
}Insert 2 numbers of value 45 at the end
#include <vector>
#include <iostream>
using namespace std;
int main ()
{
// Instantiate a vector with 4 elements, each initialized to 90
vector <int> v (4, 90);
vector <int>::iterator i;
for ( i = v.begin (); i != v.end (); ++ i ){
cout << *i << " ";
}
// Insert 2 numbers of value 45 at the end
v.insert (v.end (), 2, 45);
cout << "The vector after inserting two elements at the end: ";
for ( i = v.begin (); i != v.end (); ++ i )
{
cout << *i << " ";
}
return 0;
}Insert element by index
#include <iostream>
using std::cout;
using std::endl;
#include <vector> // vector class-template definition
#include <algorithm> // copy algorithm
#include <iterator> // ostream_iterator iterator
#include <stdexcept> // out_of_range exception
int main()
{
int array[ 6 ] = { 1, 2, 3, 4, 5, 6 };
std::vector< int > integers( array, array + 6 );
std::ostream_iterator< int > output( cout, " " );
integers.push_back( 2 );
integers.push_back( 3 );
integers.push_back( 4 );
cout << "Vector integers contains: ";
std::copy( integers.begin(), integers.end(), output );
// insert 22 as 2nd element
integers.insert( integers.begin() + 1, 22 );
cout << "\n\nVector integers contains: ";
std::copy( integers.begin(), integers.end(), output );
return 0;
}Vector integers contains: 1 2 3 4 5 6 2 3 4
Vector integers contains: 1 22 2 3 4 5 6 2 3 4
Insert elements from array
#include <iostream>
using std::cout;
using std::endl;
#include <vector> // vector class-template definition
#include <algorithm> // copy algorithm
#include <iterator> // ostream_iterator iterator
#include <stdexcept> // out_of_range exception
int main()
{
int array[ 6 ] = { 1, 2, 3, 4, 5, 6 };
std::vector< int > integers( array, array + 6 );
std::ostream_iterator< int > output( cout, " " );
integers.push_back( 2 );
integers.push_back( 3 );
integers.push_back( 4 );
cout << "Vector integers contains: ";
std::copy( integers.begin(), integers.end(), output );
// insert elements from array
integers.insert( integers.begin(), array, array + 6 );
cout << "\n\nContents of vector integers before clear: ";
std::copy( integers.begin(), integers.end(), output );
return 0;
}Vector integers contains: 1 2 3 4 5 6 2 3 4
Contents of vector integers before clear: 1 2 3 4 5 6 1 2 3 4 5 6 2 3 4
Insert one vector to another vector
#include <iostream>
#include <vector>
using namespace std;
int main()
{
vector<char> v(10);
vector<char> v2;
char str[] = "<Vector>";
unsigned int i;
for(i=0; i<10; i++)
v[i] = i + "a";
for(i=0; str[i]; i++)
v2.push_back(str[i]);
cout << "Original contents of v:\n";
for(i=0; i<v.size(); i++)
cout << v[i] << " ";
cout << "\n\n";
vector<char>::iterator p = v.begin();
p += 2; // point to 3rd element
v.insert(p, 10, "X");
// display contents after insertion
cout << "Size after inserting X"s = " << v.size() << endl;
cout << "Contents after insert:\n";
for(i=0; i<v.size(); i++) cout << v[i] << " ";
cout << "\n\n";
// Insert v2 into v
v.insert(p, v2.begin(), v2.end());
cout << "Size after v2"s insertion = ";
cout << v.size() << endl;
cout << "Contents after insert:\n";
for(i=0; i<v.size(); i++) cout << v[i] << " ";
cout << endl;
return 0;
}Original contents of v:
a b c d e f g h i j
Size after inserting X"s = 20
Contents after insert:
a b X X X X X X X X X X c d e f g h i j
Insert the contents of the array into the end of the vector
#include <vector>
#include <iostream>
using namespace std;
int main(int argc, char** argv)
{
int arr[10]; // normal C++ array
vector<int> vec; // STL vector
int i;
// Initialize each element of the array to the value of its index.
for (i = 0; i < 10; i++) {
arr[i] = i;
}
// Insert the contents of the array into the end of the vector.
vec.insert(vec.end(), arr, arr + 10);
// print the contents of the vector
for (i = 0; i < 10; i++) {
cout << vec[i] << " ";
}
return (0);
}Insert two elements from another container in position [1]
#include <vector>
#include <iostream>
using namespace std;
int main ()
{
// Instantiate a vector with 4 elements, each initialized to 90
vector <int> v (4, 90);
vector <int>::iterator i;
for ( i = v.begin (); i != v.end (); ++ i ){
cout << *i << " ";
}
vector <int> vecAnother (2, 30);
v.insert (v.begin () + 1,vecAnother.begin (), vecAnother.end ());
for ( i = v.begin (); i != v.end (); ++ i )
{
cout << *i << " ";
}
return 0;
}
