tmpfile() function in C
Last Updated :
04 Sep, 2017
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In C Programming Language, the tmpfile() function is used to produce/create a temporary file.
C
Output:
- tmpfile() function is defined in the "stdio.h" header file.
- The created temporary file will automatically be deleted after the termination of program.
- It opens file in binary update mode i.e., wb+ mode.
- The syntax of tmpfile() function is:
FILE *tmpfile(void)
- The tmpfile() function always returns a pointer after the creation of file to the temporary file. If by chance temporary file can not be created, then the tmpfile() function returns NULL pointer.
// C program to demonstrate working of tmpfile()
#include <stdio.h>
int main()
{
char str[] = "Hello GeeksforGeeks";
int i = 0;
FILE* tmp = tmpfile();
if (tmp == NULL)
{
puts("Unable to create temp file");
return 0;
}
puts("Temporary file is created\n");
while (str[i] != '\0')
{
fputc(str[i], tmp);
i++;
}
// rewind() function sets the file pointer
// at the beginning of the stream.
rewind(tmp);
while (!feof(tmp))
putchar(fgetc(tmp));
}
Temporary file is created Hello GeeksforGeeks
