deleting end of line character 2

[bi]

I have a file that has alphanumeric characters on the odd-numbered lines and digits on the even numbered lines. I want the digits to be appended at the end of the previous line. For example, I want a file that has:

alphanum1
digit1
alphanum2
digit2

to instead be:
alphanum1 digit1
alphanum2 digit2

I have tried doing this with sed and tr, but can't seem to get it. I'm fairly new to both, and have made some good headway on earlier parts of the script I'm writing, but I just can't seem to get this.

Can someone help? Is there another command I should be using, like awk?

Thanks.

 

[CaKiwi]

You could use awk

awk 'NR%2{printf $0;next}{print}' infile > outfile

CaKiwi

"I love mankind, it's people I can't stand" - Linus Van Pelt

 

[vgersh99]

OR:

nawk '{ printf("%s%s", $0, (NR % 2) ? " " : "\n&quot}' infile

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

 

[bi]

Thank you both. That's what I needed.