3. Write a C++ program that reads 10 integer numbers from a file called input.txt and stores them in an array called data. After the user inputs 10 numbers, the program asks him how many of these 10...

Extracted text: 3. Write a C++ program that reads 10 integer numbers from a file called input.txt and stores them in an array called data. After the user inputs 10 numbers, the program asks him how many of these 10 numbers he wants to sum. For example, if the user enters 3, the program will sum the first 3 numbers only stored in the array.