@echo off
powershell -c "Get-Content a.txt | Foreach-Object {$s=0}{$s += [Double]($_)}{$s/20}"
pause
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@if (0)==(0) echo off
setlocal enabledelayedexpansion

set "strParams="
for /f "delims=" %%i in (1.txt) do set "strParams=!strParams!%%i "
echo,传入参数为 %strParams%
cscript -nologo -e:jscript %~s0 %strParams%

pause & goto :EOF
@end

var nParmCount;
nParamCount = WScript.arguments.length;
var fSum=0, fAvg=0;
for (var i=0; i<nParamCount; i++) {
	var fTmp = parseFloat(WScript.arguments(i));
	fSum+=fTmp;
}
fAvg = fSum / nParamCount;
WScript.echo(nParamCount + "个数的总和为 : " + fSum + "   平均数为 : " + fAvg);
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cat .\b.txt|measure-object -average 
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@if(0)==(0) echo off
CScript.exe -NoLogo -E:JScript %0 < "b.txt"
pause&exit
@end
var text = WSH.StdIn.ReadAll().split('\r\n');
var len = text.length;
var cnt = 0;
for (var i = 0; i < len; i++) {
  var j = +text[i];
  cnt += j;
}
var avg = cnt / len;
WSH.echo(avg)
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@echo off
setlocal enabledelayedexpansion
for /f %%a in (a.txt) do (
        set "x=%%~xa00"
        set "x=!x:.=!"
        set /a "n+=1,Sum+=%%~na00+1!x:~,2!-100"
)
set /a Avg=Sum/n
echo,!Avg:~,-2!.!Avg:~-2!
pause
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