批处理数字前加0

@echo off&setlocal enabledelayedexpansion  
for /f "tokens=1,2 delims=-" %%a in (rq.txt) do (  
echo 源串:%%a-%%b  
pause  
  
if 1%%a lss 100 (set var1=0%%a) else set var1=%%a  
if 1%%b lss 100 (set var2=0%%b) else set var2=%%b  
  
echo !var1!-!var2!>>test.txt  
  
)  
  
del /q rq.txt  
ren test.txt rq.txt  
  
1pause