sed/awk quicky

[ranjit]

Is there a quick sed/awk approach to remove the new line character in a file replacing it with a space?

Example input file:
a
b
c

Desired results:
a b c

The tr commands appear to work with:
tr "\012" " " <input_file.txt

 

[vgersh99]

nawk -v ORS=" " '1' myFile.txt

vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+