Why doesn't this piece of code work?

[kdevel]

On Sunday, 15 May 2022 at 11:10:41 UTC, SvGaming wrote:
> I want to ask the user to select their USB drive by typing the 
> mount location. For some reason that does not work and just 
> skips over the user input part.
> ```d
> void writeusb() {
> 	writeln("Here is a list of your mounted drives: ");
> 	auto mounts = executeShell("cat /proc/mounts | grep media");
> 	writeln(mounts.output);
> 	writef("Type the path to your USB drive: ");
> 	string cont = readln;
> 	writeln(a);
> 	writeln("A file selection menu will now appear so you can 
> select an ISO to write.");
> 	auto seliso = executeShell("zenity --file-selection");
> 	writeln(seliso.output);
> }
> ```
> I am clueless as to what I need to do here? Can anyone help?

```
import std.stdio;
import std.process;

int main ()
{
    writeln("Here is a list of your mounted drives: ");
    auto mounts = executeShell("cat /proc/mounts | grep media");
    writeln(mounts.output);
    writef("Type the path to your USB drive: ");
    string cont = readln;
    writeln(cont); // there was no variable named "a"
    writeln("A file selection menu will now appear so you can 
select an ISO to write.");
//   auto seliso = executeShell("zenity --file-selection");
//   writeln(seliso.output);
    return 0;
}
```

This code runs as expected.