用C ++将大文本文件读取到内存

Question

Is there a way to read a large text file (~60MB) into memory at once (like a compiler flag to increase program memory limit) ? Currently, ofstream's open function throws a segmentation fault while trying to read this file.

ifstream fis;
fis.open("my_large_file.txt"); // Segfaults here

The file just consists of rows of the form

number_1<tabspace>number_2

ie, two numbers separated by a tabspace.

Answer 1

You have some other problem, because you aren't reading the file by just calling open . My guess is the file doesn't exist (or doesn't exist in the relative path you think it should exist in).