@echo off if "%1"=="" goto loop copy maxnumber%1.in maxnumber.in >nul echo Problem Test echo Data %1 time<enter maxnumber.exe time<enter fc maxnumber.out maxnumber%1.out del maxnumber.in del maxnumber.out pause goto end :loop for %%i in (1 2 3 4 5 6 7 8) do call %0 %%i :end