Shell Programming and Scripting

I have a very inefficient awk below that I need some help improving. Basically, there are three parts, that ideally, could be combined into one search and one output file. Thank you .

Part 1:
Check if the user inputted string contains + or - in it and if it does the input is writting to a file "input" and displayed on screen.

Code:

awk '/+/{print $0,"is an intronic variant"}' c:/Users/cmccabe/Desktop/Python27/input.txt
awk '/-/{print $0,"is an intronic variant"}' c:/Users/cmccabe/Desktop/Python27/input.txt

Part 2:
Looks within that "input" file for any lines with a + or - and if found writes them to a new file (temp+ or temp-)

Code:

awk '/+/' c:/Users/cmccabe/Desktop/Python27/input.txt > c:/Users/cmccabe/Desktop/Python27/temp+.txt 
awk '/-/' c:/Users/cmccabe/Desktop/Python27/input.txt > c:/Users/cmccabe/Desktop/Python27/temp-.txt

Part 3:
Removes the + or - lines from the "input" file.

Code:

sed -i '/+/d' C:/Users/cmccabe/Desktop/Python27/input.txt
sed -i '/-/d' C:/Users/cmccabe/Desktop/Python27/input.txt