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c++ vector

Sam davies 
#include <vector>

int main() {
  std::vector<int> v;
  v.push_back(10); // v = [10];
  v.push_back(20); // v = [10, 20];
  
  v.pop_back(); // v = [10];
  v.push_back(30); // v = [10, 30];
  
  auto it = v.begin();
  int x = *it; // x = 10;
  ++it;
  int y = *it; // y = 30
  ++it;
  bool is_end = it == v.end(); // is_end = true
  
  return 0;
}
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4
4
OliviaB 110 points 

                                    #include &lt;iostream&gt; 
#include &lt;vector&gt; 
  
using namespace std; 
  
int main() 
{ 
    vector&lt;int&gt; g1; 
  
    for (int i = 1; i &lt;= 5; i++) 
        g1.push_back(i); 
  
    cout &lt;&lt; &quot;Output of begin and end: &quot;; 
    for (auto i = g1.begin(); i != g1.end(); ++i) 
        cout &lt;&lt; *i &lt;&lt; &quot; &quot;; 
  
    cout &lt;&lt; &quot;\nOutput of cbegin and cend: &quot;; 
    for (auto i = g1.cbegin(); i != g1.cend(); ++i) 
        cout &lt;&lt; *i &lt;&lt; &quot; &quot;; 
  
    cout &lt;&lt; &quot;\nOutput of rbegin and rend: &quot;; 
    for (auto ir = g1.rbegin(); ir != g1.rend(); ++ir) 
        cout &lt;&lt; *ir &lt;&lt; &quot; &quot;; 
  
    cout &lt;&lt; &quot;\nOutput of crbegin and crend : &quot;; 
    for (auto ir = g1.crbegin(); ir != g1.crend(); ++ir) 
        cout &lt;&lt; *ir &lt;&lt; &quot; &quot;; 
  
    return 0; 
}

4 (4 Votes)
0
3.33
9
Panky1986 130 points 

                                    #include &lt;vector&gt;

int main() {
  std::vector&lt;int&gt; myVector = { 666, 1337, 420 };
  
  size_t size = myVector.size(); // 3
  
  myVector.push_back(399); // Add 399 to the end of the vector
  
  size = myVector.size(); // 4
}

3.33 (6 Votes)
0
4.5
8
Yohann Dias 145 points 

                                    #include &lt;vector&gt;
std::vector&lt;std::string&gt; x;

4.5 (8 Votes)
0
5
1
Memorydoor 105 points 

                                    
vector&lt;int&gt; vec;
//Creates an empty (size 0) vector
 

vector&lt;int&gt; vec(4);
//Creates a vector with 4 elements.

/*Each element is initialised to zero.
If this were a vector of strings, each
string would be empty. */

vector&lt;int&gt; vec(4, 42);

/*Creates a vector with 4 elements.
Each element is initialised to 42. */


vector&lt;int&gt; vec(4, 42);
vector&lt;int&gt; vec2(vec);

/*The second line creates a new vector, copying each element from the
vec into vec2. */

5 (1 Votes)
0
0
0
AliceKitaen 80 points 

                                    vector_name.push_back(element_to_be_added);

0
0
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