tmpnam
From cppreference.com
Defined in header <stdio.h>
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char *tmpnam( char *filename ); |
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Creates an unique filename and stores it in character string pointed to by filename
. The function is capable of generating up to TMP_MAX
of unique filenames, but some or all of them may be in use in the filesystem and thus not suitable return values.
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Parameters
filename | - | pointer to the character string to be used as a result buffer. If NULL is passed, a pointer to an internal static buffer is returned.
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Return value
filename
if filename
was not Template:cpp. Otherwise a pointer to an internal static buffer is returned. If no suitable filename can be generated, Template:cpp is returned.