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How to create a dynamic array of integers in C++ using the new keyword?
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We can create an array of pointers also dynamically using a double pointer. Once we have an array pointers allocated dynamically, we can dynamically allocate memory and for every row like method 2.
Dynamic arrays are very useful data structures. They can be initialized with variable size at runtime. This size can be modified later in the program to expand (or) shrink the array. Unlike fixed-size arrays and Variable Length Arrays, Dynamically sized arrays are allocated in the heap.
int main() { int size; std::cin >> size; int *array = new int[size]; delete [] array; return 0; } Don't forget to delete every array you allocate with new.
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