please correct my char count program...

[Daniel Keep]

import std.stdio : readln, writef, writefln;

void main()
{
    writef("Please input your text: ");
    auto s = readln();
    writefln("Your text length is: %s", s.length);
}

Note that strings in D are *not* NUL-terminated like they are in C.
Your code wouldn't work since the .length of a char[100] is *always*
100.  The following is untested, but should work:

import std.string : toString;

void main()
{
    char[100] c_string_buffer;
    scanf("%s", c_string_buffer.ptr);
    auto d_string = toString(c_string_buffer.ptr);
}

.ptr gives you a pointer to an array's first element, so (char[100]).ptr
is a char*.

In this case, toString(char*) assumes its argument is a C-style
NUL-terminated string, and converts it to a D string.  Note that it will
return a slice of the input data, so that in this particular case,
d_string must not outlive c_string_buffer.

	-- Daniel