no such file or directory and malformed developer path

Hi All,

I was tried to run program after compiling ( See on the bottom) using the command
./vbs vbs.f

but got the error:
zsh: no such file or directory: ./vbs
Also I am not sure about compiling because got a line ( See on the middle on the bottom):
xcode-select: error: malformed developer path ("/Library/Developer/CommandLineTools")

What should I do?
Thank you

Pavel@MacBook-Pro-2 Vibe_OPS_30.01.17 %
Pavel@MacBook-Pro-2 Vibe_OPS_30.01.17 % gfortran -o vbs vbs.f
xcode-select: error: malformed developer path ("/Library/Developer/CommandLineTools")
Pavel@MacBook-Pro-2 Vibe_OPS_30.01.17 %
Pavel@MacBook-Pro-2 Vibe_OPS_30.01.17 % ./vbs vbs.f
zsh: no such file or directory: ./vbs
Pavel@MacBook-Pro-2 Vibe_OPS_30.01.17 %