【01】by [lxmxn]
========================================================================================

@echo off&&setlocal ENABLEDELAYEDEXPANSION
for %%a in (1 2 3 4 5 6 7 8 9) do (
for %%b in (0 1 2 3 4 5 6 7 8 9) do (
for %%c in (0 1 2 3 4 5 6 7 8 9) do (
set/a result=%%a*%%a*%%a+%%b*%%b*%%b+%%c*%%c*%%c
if "!result!"=="%%a%%b%%c" (
echo %%a%%b%%c是水仙花數(shù)！
)

)
)
)
pause

========================================================================================
【02】by [lxmxn]
========================================================================================
========================================================================================
【03】by [youxi01]
========================================================================================
@echo off
setlocal enabledelayedexpansion
for /l %%i in (10 1 30) do (
::清空變量
set flag=
for /l %%a in (0 1 9) do set %%a=
::取得立方和四次方
set /a cube=%%i*%%i*%%i
set /a s=!cube!*%%i
if !cube! geq 1000 if !cube! lss 10000 (
if !s! geq 100000 if !s! lss 1000000 (
set num=!s!!cube!
call :test !num!
if not defined flag echo %%i !num!
)
)
)

pause>nul
:test
for /l %%a in (0 1 9) do (
set var=%1
::將參數(shù)的第一個(gè)數(shù)字賦值給var_；檢查變量值!var_!是否已經(jīng)被作為變量被定義。
set var_=!var:~%%a,1!
if defined !var_! set flag=1 & goto :eof
set !var_!=A
)

========================================================================================
【04】by [youxi01]
========================================================================================

@echo off
set /a t_num=0
setlocal enabledelayedexpansion

echo 正在檢測(cè)數(shù)據(jù).....
for /l %%i in (1 1 4889) do (
if !t_num! lss 4889 (
if %%i lss 10 set /a t_num+=1
if %%i geq 10 if %%i lss 100 set /a t_num+=2
if %%i geq 100 if %%i lss 1000 set /a t_num+=3
if %%i geq 1000 set /a t_num+=4
) else set /a num=%%i-1 & goto :exit
)
:exit
echo 要求的數(shù)為：%num%
pause>nul

========================================================================================
【05】by [youxi01]
========================================================================================

@echo off
set /a F_num=23
set /a J_num=60/4

setlocal enabledelayedexpansion
for /l %%i in (1 1 %J_num%) do (
set /a S_num=%%i
set /a B_num=%J_num%-%%i
set /a num=!S_num!+2*!B_num!
call :test !num! !S_num! !B_num!
)
pause>nul

:test
if %1 EQU %F_num% echo 可能的組合為：?jiǎn)畏鍞?shù)目=%2 雙峰數(shù)目=%3
goto :eof

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