echo off

set mergetoolexe="%~dp0..\..\..\mergetool.exe"

set contributorFiles= -s="%~dp0src.c" -b="%~dp0base.c" -d="%~dp0dst.c"

set resultFile= -r="%~dp0mergetoolresult.c"

%mergetoolexe%%contributorFiles%%resultFile%


::  if you want to launch manually instead, you can try the following :-)

::  ..\..\..\mergetool.exe -s=src.c -b=base.c -d=dst.c -r=mergetoolresult.c