.txt file into an array

[skiian]

I need to know how to store numbers from a file into an array, but we don't know how many numbers will be given. what can i do to adjust the array depending on how many numbers are given?

[keskiverto]

Do you want to be able to store values that you read from a file? Use std::vector.
See http://www.cplusplus.com/reference/vector/vector/

Or, do you actually want to learn logical thinking by playing only with low level language constructs? Then the keyword is dynamic memory allocation / reallocation / deallocation. (The vector does that automatically.)

[Nick Schuck]

Can you give more information about the problem. Do you have to use an array? What exactly are you trying to have your program do?