Hi guys:

   input is two line, first line is a number n and second line is n float point number，
    e.g. 3
         1.1 2.2 3.3
    how use stdin.readf get all number. i code below but not work well.

        int n;
        stdin.readf!"%d\n"(n);
        writeln("read n:",n);

        foreach (i; 0..n)
        {
                double x;
                stdin.readf!"%f"(x); //only return first number, why？
                writeln(x);
        }

On Tuesday, 3 September 2019 at 12:55:29 UTC, lili wrote:
> Hi guys:
>
>    input is two line, first line is a number n and second line is n float point number，
>     e.g. 3
>          1.1 2.2 3.3
>     how use stdin.readf get all number.

https://dlang.org/library/std/stdio/readf.html
see example

On Tuesday, 3 September 2019 at 13:21:16 UTC, a11e99z wrote:
> On Tuesday, 3 September 2019 at 12:55:29 UTC, lili wrote:
>> Hi guys:
>>
>>    input is two line, first line is a number n and second line is n float point number，
>>     e.g. 3
>>          1.1 2.2 3.3
>>     how use stdin.readf get all number.
>
> https://dlang.org/library/std/stdio/readf.html
> see example

        string d = "3.4    3.3 ";
        double a;
        double b;

        //formattedRead(d,"%f %f", &a, &b);

        d.readf!" %s %s"(a,b);//hug
        writeln(a,b);

On Tuesday, 3 September 2019 at 12:55:29 UTC, lili wrote:
> Hi guys:
>
>    input is two line, first line is a number n and second line is n float point number，
>     e.g. 3
>          1.1 2.2 3.3
>     how use stdin.readf get all number.

u can read array this way too
> auto darr = readln.split.map!(x => x.to!double).array;
> darr.writeln;

On Tuesday, 3 September 2019 at 13:25:30 UTC, lili wrote:
> On Tuesday, 3 September 2019 at 13:21:16 UTC, a11e99z wrote:
>> On Tuesday, 3 September 2019 at 12:55:29 UTC, lili wrote:
>
>         string d = "3.4    3.3 ";
>         double a;
>         double b;
>
>         //formattedRead(d,"%f %f", &a, &b);
>
>         d.readf!" %s %s"(a,b);//hug
>         writeln(a,b);

and this too
> string ds = "1.1 2.2 3.3";
> double[] darr;
> ds.formattedRead!"%( %s%)"( darr );
> darr.writeln;