The fclose() function is used for closing opened files. The only argument it accepts is the file pointer
Example of fclose() function
#include <stdio.h>
main ()
{
FILE *fp;
float total;
fp = fopen("data.txt", "w+");
if (fp == NULL) {
printf("data.txt does not exist, please check!\n");
exit (1);
}
fprintf(fp, 100);
fscanf(fp, "%f", &total);
fclose(fp);
printf("Value of total is %f\n", total);
}