Why Rename in C not working correctly?

Question

It was working correctly a while ago. But i dont know what was is the error.

My Code:

char oldfn[] = "d://booksdata.txt";
char newfn[] = "d://booksdata_temp.txt";
remove(oldfn);
rename(newfn, oldfn);

Remove function works correctly but my rename function does not work.

Answer 1

From ISO/IEC9899:

7.19.4.2 The rename function

Synopsis

1 #include < stdio.h>

int rename(const char *old, const char *new);

As you can see by the prototype: you are using the old and new arguments in the wrong place.

Just switch then and one error is fixed. If there is still one... Tell us the error text please.