- #1
Sadmemo
- 32
- 0
How can i read file data into 2d vector ?thanks
AI Thread Summary
To read file data into a 2D vector, it's essential to clarify the type of vector being used, such as a standard template library (STL) vector. If not using STL, a custom 2D memory allocation is necessary. The content of the file—whether it contains characters, integers, doubles, or strings—along with its formatting and size, significantly influences the approach. For example, typical desktop PCs may face limitations when attempting to read more than 2GB of integers into memory simultaneously, although the file can still be stored on disk.
- #2
chroot
Staff Emeritus
Science Advisor
Gold Member
- 10,266
- 45
What kind of "vector?" A standard template library vector<?>, or what?
- Warren
- Warren
- #3
neurocomp2003
- 1,359
- 4
uh you got to create a vector or 2D memory allocation if your not using the STL-vector that chroot mentioned. Heh nice name chroot->>>BOO LINUX 
- #4
egsmith
- 53
- 0
It also matters what this file contains (chars, ints, doubles, strings, ...), how it is formatted, and how much data it contains. For instance on a typical desktop PC you will not be able to read more than 2GB of ints into memory at once altough you will be able to hold the file on disk just fine.
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