batch file - How to open a program using user input -


i writing program open program when user types in: "open chrome" open chrome. have this:

set /p start=what should do? if /i "%start%"==" open calculator" goto calculator

:calculator start c:\windows\system32\calc.exe

so @ calculator starts program calculator. want user type in "open" , code knows "open" = "start" , whatever comes next has open.

so code takes apart user types in if type in "open" turns start , puts in code so: set /p "input= " %input% + %input2.exe first thing user types in equals input , second thing user types in equals input2 can type in start calc , code be: start calc.exe because it's added .exe in second word user types in.

when give me answer can please explain each bit does?

@echo off setlocal  :nextcommand echo/ set /p "input=what should do? "  if /i "%input%" equ "exit" (    echo bye...    exit /b )  rem try change "open" "start" in input line set "changed=%input:open=start%"  rem check if input changed if "%changed%" equ "%input%" (    echo don't know how %input%    goto nextcommand )  rem execute changed line adding ".exe" @ end %changed%.exe echo done! goto nextcommand

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