SW006014 Microchip Technology, SW006014 Datasheet - Page 89

• Manufacturer Part Number: SW006014
• Description: C COMPILER MPLAB FOR PIC24 MCU
• Manufacturer: Microchip Technology
• Type: MPLAB® C Compilerr
• Series: PIC24r

Specifications of SW006014

• Supported Families: PIC24
• Core Architecture: PIC
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC24
• Tool Function: Compiler
• Tool Type: Compiler
• Processor Series: PIC24
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: PIC24
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2008 Microchip Technology Inc.
tmpnam
Description:
Include:
Prototype:
Argument:
Return Value:
Remarks:
Example:
ungetc
Description:
Include:
Prototype:
Argument:
Return Value:
Remarks:
Creates a unique temporary filename
<stdio.h>
char *tmpnam(char *s);
s
Returns a pointer to the filename generated and stores the filename in
s. If it can not generate a filename, the NULL pointer is returned.
The created filename will not conflict with an existing file name. Use
L_tmpnam to define the size of array the argument of tmpnam points
to.
#include <stdio.h> /* for tmpnam, L_tmpnam, */
int main(void)
{
}
Output:
Temporary file ctm00001.tmp was created
Pushes character back onto stream.
<stdio.h>
int ungetc(int c, FILE *stream);
c
stream
Returns the pushed character if successful; otherwise, returns EOF
The pushed back character will be returned by a subsequent read on
the stream. If more than one character is pushed back, they will be
returned in the reverse order of their pushing. A successful call to a file
positioning function (fseek, fsetpos or rewind) cancels any pushed
back characters. Only one character of pushback is guaranteed. Multi-
ple calls to ungetc without an intervening read or file positioning oper-
ation may cause a failure.
char *myfilename;
char mybuf[L_tmpnam];
char *myptr = (char *) &mybuf;
if ((myfilename = tmpnam(myptr)) == NULL)
else
printf("Cannot create temporary file name");
printf("Temporary file %s was created",
myfilename);
pointer to the temporary name
character to be pushed back
pointer to the open stream
/* printf, NULL
DS51456E-page 85
*/