An input file is formatted as follows: the first number is the number n of values in the text file, followed by n numerical values. Write the following functions:

double* readArray(int &size);

void printResults(double *arr,int size);

The readArray function should do the following steps:

• Open the input file input.txt and make sure it is opened successfully, if not print an error message and exit the program.
• Declare a pointer of type double call it arr.
• Read the size of the array from the input file, save it in the pass-by-reference size variable
• Allocate memory for arr of the size that you read from the file
• Read values from the file and save them into the arr.
• Close the input file
• Return arr to the caller.

Th printResults function should do the following steps:

• Open an output file called output.txt
• Declare and initialize variables for min, max and sum, make sure not to use a constant value (like 0) to initialize the min and max.
• Calculate min, max and sum.
• Print min max and sum to the output file.

Write a C++ program that declare a pointer of type double A and an int size, then call readArray function to initialize the Array A and the size. Then call the printResults function to print the results an output file named output.txt.