@echo off
setlocal enabledelayedexpansion

rem Define array of strings
set strings[0]=3005 B1 c1 = 3005 B2 s1;
set strings[1]=3023 P1 r2 = 3023 P2 l2;
set strings[2]=3710 T3 s4 = 3710 T4 s3;

rem Path to ldcad32.exe (if not in PATH, set the full path)
set "LDCAD=ldcad32.exe"

rem Loop through array
set i=0
:loop
set "line=!strings[%i%]!"
if defined line (
    rem Generate .ldr file
    echo !line! | ls2ldr.exe > "!line!.ldr"
    echo Created "!line!.ldr"

    rem Launch ldcad32 and wait for it to close
    start /wait "" "%LDCAD%" "!line!.ldr"
    echo Closed LDCad for "!line!.ldr"

    set /a i+=1
    goto loop
)

endlocal