Question

How to use tmpfile() function to create temporary binary file for update ("wb+") in C

Answer 1

#include <stdio.h>
   
int main(void)
{
	char buf[64] = "temp file";
	FILE *fp = tmpfile();

	fputs(buf, fp);

	buf[0] = '\0';
	printf("buf = %s\n", buf);

	rewind(fp);
	fgets(buf, 64, fp);
    printf("buf = %s\n", buf);

	// Temporary file is closed and deleted when the program exits normally

    return 0;
}
  
/*
run:
  
buf =
buf = temp file

*/

 

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