fputs, stdout

[Tony]

There is a fputs/stdout in core.stdc.stdio.  std.stdio "public 
imports" that:

"public import core.stdc.stdio;"

Wondering why:

import core.stdc.stdio : fputs;
import core.stdc.stdio : stdout;

void main()
{
    fputs( cast(const char *)"hello world\n",stdout);
}

compiles and runs, but if I change the imports to:

import std.stdio : fputs;
import std.stdio : stdout;

I get this compile error:

fputs_test.d(11): Error: function core.stdc.stdio.fputs (scope 
const(char*) s, shared(_IO_FILE)* stream) is not callable using 
argument types (const(char*), File)