Write a function named createArray$()$ that creates a dynamic array of $1000$ integers.$$ The calling function must supply a variable for the length which is received as a pointer and is assigned the value of $1000$ in the createArray$()$ function.$$ It is best to define this value as a constant outside the function.$$ Initialize the array with random numbers in the range between $0$ and $999$ inclusive.$$ Assign the caller$$s pointer parameter to the length of the array and return a pointer to the dynamically created array.$$

Write a second function named writeBinary$()$ that takes a parameter pointer to an integer array and its length as a second parameter.$$ Open an output file $$binary$.$dat$$ as binary and write to it the length of the array.$$ Then write each integer in the array to the file and close the file.$$

Write a third function named readBinary$()$ that opens the $$binary$.$dat$$ file in binary mode.$$ Its only parameter should be a reference to an integer in the main code which will store the length of the returned array.$$ Read the first value from the file which is the length of an array to create.$$ Assign this value to the reference parameter so the caller$$s variable will be updated.$$ Create a new dynamic array of integers using the length value for its size.$$ In a loop, read each number from the file and save the value in the array, increasing the index for each.$$ Return a pointer to the array from the function.$$

Finally, write a main function that calls the array creation function, supplying the address of a local integer variable as a parameter representing the length of the array.$$ Receive back a pointer to the array with the length variable updated.$$ Call the writeBinary$()$ function passing a$$ pointer to the array as the first parameter and its length as a second parameter.$$ After it returns, delete the array created in the first function and set the integer pointer to nullptr.$$

Call the readBinary$()$ function passing a reference to a local integer variable which will be the array length.$$ The third function should return a pointer to a new array and update the variable with the length.$$ Write a loop to iterate over each value in the array and print out its value separated by a space.$$ Delete the dynamic array and terminate the program.$$

Use these function headers:$$

Use these function headers:$$