Append to the end of a file in C
Open with append: pFile2 = fopen(“myfile2.txt”, “a”); then just write to pFile2, no need to fseek().
fseek
Read a file backwards line by line using fseek
If you are going to read the entire file in anyways, just use file() to read the file in as an array (each line is each element in the array) and then use array_reverse() to flip the array backwards and loop through that. Or just do a reverse for loop where you start at the … Read more
Why is fseek or fflush always required between reading and writing in the update modes?
The library buffers input and output operations. Check out setvbuf() and the _IOFBF, _IOLBF parameters to that function. fseek() or fflush() require the library to commit buffered operations. The standard specifies a seek or flush operation (flushing the buffers) as mandatory prior to changing I/O direction to allow the library some shortcuts. Without this restriction, … Read more