Reading an unknown amount of data from a file into an array

[nickg140143]

Hello,

This question pertains to a programming problem that I have stumbled across in my C++ programming class.

The Assignment:
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Number Analysis Program

Write a program that asks the user for a file name. Assume the file contains a series of numbers, each written on a separate line. The program should read the contents of the file into an array and then display the following data:

The lowest number in the array
The highest number in the array
The total of the numbers in the array
The average of the numbers in the array
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My question pertains mainly to reading these numbers from a file, the question doesn't indicate any specific amount of numbers, the list could be any size, I'm at a loss here.

How can I find out how many numbers are in a file,and then use that amount as the iteration count in a for loop to put these numbers in an array?

Any help would be very much appreciated.

[Bazzy]

You can store the numbers in a resizable container ( eg: std::deque ) and then create a dynamic array using the size of that container.

Or you can read all the numbers and increasing a variable each time you find one and when you reach the end of the file, restart but this time filling the array
pseudocode:

open file
size = 0
while you can read a number
    size++
int *array = new int [size]
restart reading
for i=0 -> size
    read array[i] from file