Windows fflush

Table of Contents. Improve Article. Save Article. Like Article. Take a step-up from those "Hello World" programs. Learn to implement data structures like Heap, Stacks, Linked List and many more! Check out our Data Structures in C course to start learning today. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. This only applies to local drives, including memory sticks, floppy disc drives. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread.

I have the same question 5. Report abuse. Details required :. Cancel Submit. If fflush returns EOF , data may have been lost due to a write failure. The fflush function flushes the stream stream. If the stream was opened in write mode, or it was opened in update mode and the last operation was a write, the contents of the stream buffer are written to the underlying file or device and the buffer is discarded.

If the stream was opened in read mode, or if the stream has no buffer, the call to fflush has no effect, and any buffer is retained.

A call to fflush negates the effect of any prior call to ungetc for the stream. The stream remains open after the call. If stream is NULL , the behavior is the same as a call to fflush on each open stream. All streams opened in write mode and all streams opened in update mode where the last operation was a write are flushed.

The call has no effect on other streams. Buffers are normally maintained by the operating system, which determines the optimal time to write the data automatically to disk: when a buffer is full, when a stream is closed, or when a program terminates normally without closing the stream.