On error, it returns a number less than n. On success, it returns the count of the number of items successfully written to the file. N: It is the number of items to be written.įp: It is a pointer to the file where data items will be written. Size: It specifies the number of bytes of each item to be written. Ptr: it points to the block of memory which contains the data items to be written. The fwrite() function writes the data specified by the void pointer ptr to the file. Syntax: size_t fwrite(const void *ptr, size_t size, size_t n, FILE *fp) ![]() Although we can also use them with text mode too. As no transformation takes place binary mode is significantly faster than text mode.įread() and fwrite() functions are commonly used to read and write binary data to and from the file respectively. 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. In this chapter, we will learn how we can read and write data to and from the file using the binary mode. ![]() Up to this point, we have been using text mode to read and write data to and from the file.
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