In C Programming Language, the tmpfile() function is used to produce/create a temporary file.
- 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
"); while (str[i] != ' ') { 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)); } |
Output:
Temporary file is created Hello GeeksforGeeks
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