The problem with your code snippet is the way variables are expanded. Variable expansion is usually done when a statement is first read. In your case the whole FOR
loop and its block is read and all variables, except the loop variables are expanded to their current value.
This means %c%
in your echo %%i, %c%
expanded instantly and so is actually used as echo %%i, 1
in each loop iteration.
So what you need is the delayed variable expansion. Find some good explanation about it here.
Variables that should be delay expanded are referenced with !VARIABLE!
instead of %VARIABLE%
. But you need to activate this feature with setlocal ENABLEDELAYEDEXPANSION
and reset it with a matching endlocal
.
Your modified code would look something like that:
set TEXT_T="myfile.txt"
set /a c=1
setlocal ENABLEDELAYEDEXPANSION
FOR /F "tokens=1 usebackq" %%i in (%TEXT_T%) do (
set /a c=c+1
echo %%i, !c!
)
endlocal
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…