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Copyright 1991 David Jurgens |
FILE *fopen( const char *filename, const char *type )
- prototype in stdio.h
- type is a combination of the following:
Mode Description
"r" read text/binary
"w" write text/binary
"a" append text/binary
"+" allow update access
"t" text file
"b" binary file
Read Write Append
"rt" "wt" "at" (text)
"rb" "wb" "ab" (binary)
"r+" "w+" "a+" (update)
"r+t" "w+t" "a+t" (update text)
"r+b" "w+b" "a+b" (update binary)
read - read only (unless "r+")
write - create
append - seek to end of file or create file
- text mode input, will have CRs discarded
- using any of the stdio functions results in a default allocation
of 512 bytes for the I/O buffer and the inclusion of the standard
memory allocation functions
- returns stream or NULL on error
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fopen |
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