Fread Fwrite read/write binary data #include <stdio.h> fread char *ptr int size int number FILE *fp fwrite char *ptr int size int number FILE *fp Fread reads from the file pointed to by "fp". "Number" is the number of items of size "size" that are to be read starting at "ptr". The best way to pass the argument "size" to fread is by using "sizeof". Fread returns the number of items actually read. Fwrite writes to the file pointed to by "fp". "Number" is the number of items of size "size" reading the from memory starting at "ptr". Both functions return 0 (NULL) at the end of file or error. System calls read(), write(). Fopen(), getc(), putc(), printf().