std vector include c++
#include <vector>
std::vector<std::string> x;std vector include c++
#include <vector>
std::vector<std::string> x;vector functions c++
/*Member functions*/
Iterators
-----------------------------------------
begin | Returns an iterator to the beginning
end | Returns an iterator to the end
Capacity
-----------------------------------------
empty | Checks whether the container is empty
size | Returns the number of elements
reserve | Reserves storage
capacity | Returns the number of elements that can be held in currently allocated storage
Element access
-----------------------------------------
at | Access specified element with bounds checking
front | Access the first element
back | Access the last element
operator[] | Access specified element
Modifiers
-----------------------------------------
clear | Clears the contents
insert | Inserts elements
emplace | Constructs element in-place
erase | Erases elements
push_back | Adds an element to the end
emplace_back | Constructs an element in-place at the end
pop_back | Removes the last element
resize | Changes the number of elements stored
swap | Swaps the contents
*Notes*
- https://en.cppreference.com/w/cpp/container/vector
- https://www.geeksforgeeks.org/vector-in-cpp-stl/
- https://www.tutorialspoint.com/cpp_standard_library/vector.htmvector in c++
vector<int> g1;
for (int i = 1; i <= 5; i++)
g1.push_back(i);
cout << "Output of begin and end: ";
for (auto i = g1.begin(); i != g1.end(); ++i)
cout << *i << " ";
cout << "\nOutput of cbegin and cend: ";
for (auto i = g1.cbegin(); i != g1.cend(); ++i)
cout << *i << " ";
cout << "\nOutput of rbegin and rend: ";
for (auto ir = g1.rbegin(); ir != g1.rend(); ++ir)
cout << *ir << " ";vector keyword in c++
template < class T, class Alloc = allocator<T> > class vector;vector in c++ class
#include <iostream>
#include <vector>
class Object
{
public:
Object()
{}
~Object()
{}
void AddInt(int num)
{
m_VectorOfInts.push_back(num);
}
std::vector<int> GetCopyOfVector()
{
return m_VectorOfInts;
}
void DisplayVectorContents()
{
for( unsigned int i = 0; i < m_VectorOfInts.size(); i++ )
{
std::cout << "Element[" << i << "] = " << m_VectorOfInts[i] << std::endl;
}
std::cout << std::endl;
}
private:
std::vector<int> m_VectorOfInts;
};
int main()
{
// Create our class an add a few ints
Object obj;
obj.AddInt(32);
obj.AddInt(56);
obj.AddInt(21);
// Display the vector contents so far
obj.DisplayVectorContents();
// Creates a copy of the classes container you can only really view whats in
// the classes vector container. What ever changes you make here wont effect the class.
std::vector<int> container1 = obj.GetCopyOfVector();
// These elements wont be added as it's a copy of the container
container1.push_back(342);
container1.push_back(64);
container1.push_back(123);
// Display the classes container to see show nothing was added.
obj.DisplayVectorContents();
return 0;
}Copyright © 2021 Codeinu
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