Writing an array to a file in c

Viewed 49 times. Improve this question. Anas Mostafa. Anas Mostafa Anas Mostafa 9 2 2 bronze badges. New contributor. Are you actually using ReadFile? There's no main here so it's hard to tell which code you're actually using and which you're not. It could also easily be uninitialized variables that you haven't shown in the code. JohnnyMopp Well, these are three different categories of advice. It is not wrong in the sense that it leads to programs that never work correctly.

Write some non-character data to a disk file and read it back Write character to stream: how to use putc Write character to stdout: how to use putchar Write character to stream: how to use fputc Write character to stdout: how to use fputchar Write string to a stream: how to use fputs Write a block of data to a stream: how to use fwrite Improve this answer. Aconcagua Aconcagua Add a comment.

You probably want this Jabberwocky Jabberwocky Lavender yes exactly — Jabberwocky. The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked Related Up to this point, we have been using text mode to read and write data to and from the file.

In this chapter, we will learn how we can read and write data to and from the file using the binary mode. Recall that in binary mode data is stored in the file in the same way as in the memory, so no transformation of data takes place in binary mode. As no transformation takes place binary mode is significantly faster than text mode. Although we can also use them with text mode too.

The fwrite function writes the data specified by the void pointer ptr to the file. On success, it returns the count of the number of items successfully written to the file. On error, it returns a number less than n.