73 OK you win, I am a young one at 66 :-)

Holy macaroni! Did you work on code for that?

No it was a analog computer. No software involved. It was al in the hardware. A lot of potentiometers... I had to test and calibrate the thing.
It worked with 4 different radars. One search radar, 2 for tracking the target and one for controlling and sending commands to the missile.
Then we wend to Crete, launched a Nike Hercules and blow the drone out of the sky. In short, it worked.
Oh, the computer had to reset itself every second to avoid an overload. For that we had 'zero switches' in the computer: rotating glass rods in a oil filled pot.
Ah, a very differed world then... I am talking about the 60's. But it did was it was supposed to do.

Later they modified the computer with a lot of digital things.
Including a hard drive with a couple of 100 lines of code.
Calculating a trajectory for a rocket to intercept something is not that difficult. ( Yes it is rocket science... )

Hallo,

Thank you, just what I was looking for.

Welcome @hmjswt

To put the .exe in same folder as your source .bas file, bullet the "Output EXE to Source Folder" in the Run Menu of IDE.

Thank you @bplus. Now I am very happy.
The first program I have compiled is a program to calculate the apogee of a model rocket.
The program started, a long time ago,  as FORTRAN code, then I converted it to Microsoft BASIC-80 for CP/M.
Later I converted is to use QB45 thing like CLS and UCASE. Thinks I had to do in BASIC-80 with a self made library coded in assembler.
It is coded in BASCOM compiler stile.
It runs perfectly in QB64! How about that!
I only have to find a way to use a bigger font in the output window.
I am not that young any more ( I worked with CP/M ;-) ) . So a bigger font will be very nice.
If you are interested I can publish the code.

Greetings,
Henk Siewert

Hallo,
I am new to Linux. and QB64.
I want to compile my QB files with QB64 on Linux.
Compilation is OK and program runs OK. But where can I find the compiled ( run ) file so I can run it as a standalone ?
Thank you.
Greetings from The Netherlands.