NAME
    fprintf - formatted print to a file

SYNOPSIS
    fprintf(fd, fmt, x_1, x_2, ...)

TYPES
    fd			file
    fmt			string
    x_1, x_2, ...	any

    return		null

DESCRIPTION
    This prints to the file fd exactly what would be printed to
	the standard output by printf(fmt, x_1, x_2, ...).

EXAMPLE
    > fprintf(files(1), "h=%d, i=%d\n", 2, 3);
    h=2, i=3

    > c = config("epsilon", 1e-6); c = config("display", 6);
    > c = config("tilde", 1); c = config("outround", 0);
    > c = config("fullzero", 0);
    > fmt = "%f,%10f,%-10f,%10.4f,%.4f,%.f.\n";
    > a = sqrt(3);
    > fprintf(files(2), fmt,a,a,a,a,a,a);
    1.732051,  1.732051,1.732051  ,   ~1.7320,~1.7320,~1.

    > file = fopen("/tmp/foo", "w");
    > mat A[4] = {sqrt(2), 3/7, "undefined", null()};
    > fprintf(file, "%f%r",A,A);
    > fclose(file);
    > !cat /tmp/foo

    mat [4] (4 elements, 4 nonzero):
      [0] = 1.4142135623730950488
      [1] = ~.42857142857142857142
      [2] = "undefined"
      [3] = NULL

    mat [4] (4 elements, 4 nonzero):
      [0] = 1767766952966368811/1250000000000000000
      [1] = 3/7
      [2] = "undefined"
      [3] = NULL

LIMITS
    The number of arguments of fprintf() is not to exceed 100.

LIBRARY
    none

SEE ALSO
    printf, strprintf, print