define dynamic variable in c++ code example
Example 1: declare dynamic array c++
int main()
{
int size;
std::cin >> size;
int *array = new int[size];
delete [] array;
return 0;
}
Example 2: c++ delete dynamically allocated array
int length = 69;
int * numbers = new int[length];
delete[] numbers;
Example 3: what is dynamic memory allocation in c++
In the dynamic memory allocation the memory is allocated during run time.
The space which is allocated dynamically usually placed in a program segment which is known as heap.
In this, the compiler does not need to know the size in advance.
In C++, dynamic memory allocation means performing memory allocation manually by programmer.
It is allocated on the heap and the heap is the region of a computer memory which is managed by the programmer using pointers to access the memory.
The programmers can dynamically allocate storage space while the program is running but they cannot create a new variable name.
Example:
Example 4: c++ allocate dynamic with initial values
int length = 50;
int *array = new int[length]();