C++ tmpfile()

The file will be automatically deleted when it is closed by the program(by executing fclose) or when the program terminates.

tmpfile() prototype

 FILE* tmpfile();

It is defined in <cstdio> header file.

tmpfile() Parameters

None

tmpfile() Return value

• If successful, it returns a stream pointer to the temporary file created.
• On failure, it returns null.

Example: How tmpfile() function works

 #include <iostream> #include <cstdio> #include <cstdlib> using namespace std; int main() {	FILE *fp;	fp = tmpfile();	char writeToFile[50] = "Creating a temporary file";	if (fp==NULL)	{	perror("Error creating temporary file");	exit(1);	}	fputs(writeToFile,fp);	rewind(fp);	char readFromFile[50];	fgets(readFromFile, sizeof(readFromFile), fp);	cout << readFromFile;	fclose(fp);	return 0; }

When you run the program, the output will be:

 Creating a temporary file