Use C tmpnam function to create unique file name

Syntax

C tmpnam function has the following syntax.

Header

C tmpnam function is from header file stdio.h.

Description

C tmpnam function generates a unique filename. *name should be at least L_tmpnam characters long. L_tmpnam is defined in stdio.h.

C tmpnam function return the unique temp name on success or a null pointer on error.

The function can be called up to TMP_MAX times. TMP_MAX is defined in stdio.h, and it will be at least 25.

Example

Use C tmpnam function to create unique file name. And display three unique temporary filenames

#include <stdio.h>
/* ww  w  .  java2s .  co  m*/
int main(void)
{
  char name[40];
  int i;

  for(i=0; i<3; i++) {
    tmpnam(name);
    printf("%s ", name);
  }
  return 0;
}