Final answer:
A Python program can be written to prompt the user for the size of an array and the elements within it. It then calculates the sum and average of the given integers and displays the results.
Step-by-step explanation:
To write a program that calculates the sum and average of an integer array using user input, one could use various programming languages. Here, we will use Python as an example. The following Python program prompts the user to input the size of the array and then the integers to populate it. After receiving the input, it calculates the sum and the average of the array.
# Initialize the sum of elements
total_sum = 0
# Get the number of elements
n = int(input('Enter number of elements in the array: '))
# Initialize an empty list to store the integers
nums = []
# Get user input and populate the list while calculating the sum
for i in range(n):
num = int(input(f'Enter number {i+1}: '))
nums.append(num)
total_sum += num
# Calculate the average
average = total_sum / n
# Print the results
print(f'The sum is: {total_sum}')
print(f'The average is: {average}')
This program takes user input for the number of elements, then iteratively asks for each number and calculates the sum in the process. After which, it computes the average using the sum and count of numbers. It is a straightforward program that demonstrates basic list handling and arithmetic operations in Python.