使用Windows批处理文件中的计算变量作为命令行参数

Question

I'm trying to calculate variable value in FOR loop and then reuse it as command line parameter when calling executable file. I managed to calculate the variable, but i can't pass is to exe file

Full code:

SetParameters.bat

SET PAYLOAD_SIZE=1024 
SET OPERATIONS_COUNT=20
SET THREADS=8
SET BULKSIZE=200

And the executed bat file

call 0_SetParameters.bat
SET MAX_EMPLOYEE_ID=0
setlocal enabledelayedexpansion

FOR %%n IN (1 2 4 8) do (
@SET /a MAX_EMPLOYEE_ID+=%OPERATIONS_COUNT%
echo !MAX_EMPLOYEE_ID!
Launcher.exe -P:%PAYLOAD_SIZE% -O:%OPERATIONS_COUNT% -N:test1 -T:%%n -BULKSIZE:%BULKSIZE% -MAX_EMPLOYEE_ID:%MAX_EMPLOYEE_ID%
)

echo !MAX_EMPLOYEE_ID! - prints calculated value that i need, but when i try to pass parameter to exe file variable is equal 0 (initial variable value).

I also tried

Launcher.exe -P:%PAYLOAD_SIZE% -O:%OPERATIONS_COUNT% -N:test1 -T:%%n -BULKSIZE:%BULKSIZE% -MAX_EMPLOYEE_ID:!MAX_EMPLOYEE_ID!

but this passes string "!MAX_EMPLOYEE_ID!" and not the numeric value. So how can i use this variable when calling exe file?

UPDATE: Ok, i understood what was happening here. Actually everything worked, executable was called with calculated parameter, but output to console was printing -MAX_EMPLOYEE_ID:!MAX_EMPLOYEE_ID!

So correct way to call executable is

Launcher.exe -P:%PAYLOAD_SIZE% -O:%OPERATIONS_COUNT% -N:test1 -T:%%n -BULKSIZE:%BULKSIZE% -MAX_EMPLOYEE_ID:!MAX_EMPLOYEE_ID!

Answer 1

Here is a sample that proves your code works: it doesn't use the %%n variable as you code doesn't use it.

@echo off
set OPERATIONS_COUNT=5
setlocal enabledelayedexpansion
FOR %%n IN (1 2 4 8) do (
SET /a MAX_EMPLOYEE_ID+=OPERATIONS_COUNT
echo !MAX_EMPLOYEE_ID!
echo Launcher.exe -MAX_EMPLOYEE_ID:!MAX_EMPLOYEE_ID!
)
pause