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   fcloseall
   Usage
   #include <stdio.h>
   int fcloseall();

   Description
   fcloseall  closes all open streams/files except stdin and stdout.  Any
   data in the I/O buffers is flushed before closing.

   Example
   #include <stdio.h>
   main()
   {
   int x;
   FILE *fp1, *fp2;

        fp1 = fopen("file1.dta","r");
        if(fp1 == NULL)
        {
             printf("Datafile not opened\n");
             exit(1);
        }
        fp2 = fopen("file2.dta","r");
        if(fp2 == NULL)
        {
             printf("Datafile not opened\n");
             exit(1);
        }
        x = fcloseall();
        printf("fcloseall closed %d streams\n",x);
   }

   Return Value
   fcloseall returns the number of streams closed.