devxlogo

Truncating a File Stream

Why Trust Us

Certain files need to be emptied every time an application opens them before it writes new data to them, for example, a per-session log file. One way to achieve this is by deleting the original file and creating a new one with the same name. However, the library offers a simpler solution. When you open a file stream with the ios::trunc flag, the file is truncated (i.e., its length becomes 0). For example:

 ofstream fout(






Charlie has over a decade of experience in website administration and technology management. As the site admin, he oversees all technical aspects of running a high-traffic online platform, ensuring optimal performance, security, and user experience.
See also  How Engineering Leaders Spot Weak Proposals
Disclosure

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

Show More