C Programming Tutorial - 47 - The Heap

#include <stdio.h>
#include <stdlib.h>

int main()
{
    // before now, the memory your program was allowed to use was limited by the variables it declared
    // what if we need more space that our variables reserved?
    // what if we don't know how many "employees" we are going to need in our array

    // this creates an integer pointer, points to first item in heap
    int * points;

    // malloc gets memory from the heap, need to tell it how many bytes
    // we don't know how many bytes an int is, but we know we need 10
    // (int *) is an int typecast pointer, we will be using this memory to store ints
    // can now just use point[0], points[1], etc...
    points = (int *) malloc(5 * sizeof(int));

    return 0;
}