Shell Programming and Scripting

Hi, I have a question that I cannot solve.
if I have a file like this (lets say "x-values.dat"):
x1
x2
x3
another file like this (lets say "y-values.dat"):
y1
y2
y3
y4
and another file like this (lets say "p-values.dat"):
p1
p2
p3
...
p12
How can I get this output?
x1 y1 p1
x1 y2 p2
x1 y3 p3
x1 y4 p4
x2 y1 p5
x2 y2 p6
x2 y3 p7
x2 y4 p8
x3 y1 p9
x3 y2 p10
x3 y3 p11
x3 y4 p12

Any help would be much appreciated

Code:

paste -d\  file1 file2 file3

If the all files have the same number of records.

No, the files doesn't have the same number of records (in my example, X has 3 values, Y has 4, and P has 12), and the code you suggested me didn't work, because it merge each line of each file, and that is not what I exactly need.
You can check my first post in order to see the output that I need.

Try this:

Code:

awk '{
  while ( (getline y < "y-values.dat") > 0 ) {
    s=$0 FS y
    getline p < "p-values.dat"
    print s FS p
  }
  close("y-values.dat")
}' x-values.dat

The code suggested by Franklin52 worked fine, although it prints 4 lines more. This is the output that I got:
x1 y1 p1
x1 y2 p2
x1 y3 p3
x1 y4 p4
x2 y1 p5
x2 y2 p6
x2 y3 p7
x2 y4 p8
x3 y1 p9
x3 y2 p10
x3 y3 p11
x3 y4 p12
y1 p12
y2 p12
y3 p12
y4 p12

But for the moment it's ok, I can remove these extra lines.
Thank you very much Franklin52!

You have one empty line in the file x-values.dat.

You're right, and now your script is working like a charm :-)
Tahnk you so much!!