为什么随机数始终为50，但在批处理脚本中它应该介于0和5之间？

Question

我跑进一个游戏，我正在做一个错误，就会通过这个命令行造成的：

set mdmg=%rdm% %%5 +1 

结果总是50，但它意味着是0到5 Rdm为%random%由办法。

这是怎么发生的？

这里是它在运行块：

REM////////////////BATTLE\\\\\\\\\\\\\\\\\\ 

:prebattle 
setlocal enabledelayedexpansion 
set rdm=%random% 

if "!weapon!" EQU "1" (
set /a pdmg=!rdm! %%25 +1 
) 

if "!armor!" EQU "1" (
set /a php=100 
) 

set mhp=50 
set mdmg=!rdm! %%5 +1 

set /p %c%=user 

if %c% EQU 1 (
echo !mhp! 
) 
if %c% EQU 2 (
echo !mdmg! 
) 
if %c% EQU 3 (
echo !mlvl! 
) 
pause 

if "!lvl!" EQU "1" if "!lvl!" LEQ "5" (
set /a enemyno=!rdm! %%3 +1 
set /a mhp+=!rdm! %%20 +1 
set /a mdmg+=!rdm! %%20 +1 
set /a mlvl=!rdm! %%5 +1 
) 

set /p %c%=user 

if %c% EQU 1 (
echo !mhp! 
) 
if %c% EQU 2 (
echo !mdmg! 
) 
if %c% EQU 3 (
echo !mlvl! 
) 
pause 

if "!lvl!" GEQ "6" if "!lvl!" LEQ "10" (
set /a enemyno=!rdm! %%6 +1 
set /a mhp+=!rdm! %%20 +1 
set /a mdmg+=!rdm! %%15 +1 
set /a mlvl=!rdm! %%10 +1 
) 
if "!lvl!" GEQ "11" if "!lvl!" LEQ "15" (
set /a enemyno=!rdm! %%9 +1 
set /a mhp+=!rdm! %%20 +1 
set /a mdmg+=!rdm! %%15 +1 
set /a mlvl=!rdm! %%16 +1 
) 
if "!lvl!" GEQ "16" if "!lvl!" LEQ "20" (
set /a enemyno=!rdm! %%12 +1 
set /a mhp+=!rdm! %%20 +1 
set /a mdmg+=!rdm! %%15 +1 
set /a mlvl=!rdm! %%22 +1 
) 
if "!lvl!" GEQ "21" if "!lvl!" LEQ "25" (
set /a enemyno=!rdm! %%15 +1 
set /a mhp+=!rdm! %%20 +1 
set /a mdmg+=!rdm! %%15 +1 
set /a mlvl=!rdm! %%30 +1 
) 
if "!lvl!" GEQ "26" if "!lvl!" LEQ "30" (
set /a enemyno=!rdm! %%18 +1 
set /a mhp+=!rdm! %%20 +1 
set /a mdmg+=!rdm! %%15 +1 
set /a mlvl=!rdm! %%35 +1 
) 

set /p %c%=user 

if %c% EQU 1 (
echo !mhp! 
) 
if %c% EQU 2 (
echo !mdmg! 
) 
if %c% EQU 3 (
echo !mlvl! 
) 
pause 


if "!enemyno!" EQU "1" goto enemy1 
if "!enemyno!" EQU "2" goto enemy2 
if "!enemyno!" EQU "3" goto enemy3 
if "!enemyno!" EQU "4" goto enemy4 
if "!enemyno!" EQU "5" goto enemy5 
if "!enemyno!" EQU "6" goto enemy6 
if "!enemyno!" EQU "7" goto enemy7 
if "!enemyno!" EQU "8" goto enemy8 
if "!enemyno!" EQU "9" goto enemy9 
if "!enemyno!" EQU "10" goto enemy10 
if "!enemyno!" EQU "11" goto enemy11 
if "!enemyno!" EQU "12" goto enemy12 
if "!enemyno!" EQU "13" goto enemy13 
if "!enemyno!" EQU "14" goto enemy14 
if "!enemyno!" EQU "15" goto enemy15 
if "!enemyno!" EQU "16" goto enemy16 
if "!enemyno!" EQU "17" goto enemy17 
if "!enemyno!" EQU "18" goto enemy18 
if "!enemyno!" EQU "19" goto enemy19 
if "!enemyno!" EQU "20" goto enemy20 
if "!enemyno!" EQU "21" goto enemy21 
if "!enemyno!" EQU "22" goto enemy22 
if "!enemyno!" EQU "23" goto enemy23 
if "!enemyno!" EQU "24" goto enemy24 
if "!enemyno!" EQU "25" goto enemy25 
if "!enemyno!" EQU "26" goto enemy26 
if "!enemyno!" EQU "27" goto enemy27 
if "!enemyno!" EQU "28" goto enemy28 
if "!enemyno!" EQU "29" goto enemy29 
if "!enemyno!" EQU "30" goto enemy30 

goto prebattle 

Answer 1

我只是把这个代码在这里为你，这样也许你会终于明白什么是你的代码错误。还有更多的输入有效性检查可以放在那里。我不是很了解你在用USER变量做什么。我纠正的代码使得假设代码块之前和之后的代码是正确的。

REM////////////////BATTLE\\\\\\\\\\\\\\\\\\  

:prebattle 
set rdm=%random%  

if "%weapon%" EQU "1" set /a pdmg=rdm %% 25 +1  

if "%armor%" EQU "1" set /a php=100 


set mhp=50 
set /a mdmg=rdm %% 5 +1 

set "c=" 
set /p c=user 

if %c% EQU 1 echo %mhp% 
if %c% EQU 2 echo %mdmg% 
if %c% EQU 3 echo %mlvl% 

pause 

if "%lvl%" EQU "1" if "%lvl%" LEQ "5" (
    set /a enemyno=rdm %% 3 +1 
    set /a mhp+=rdm %% 20 +1 
    set /a mdmg+=rdm %% 20 +1 
    set /a mlvl=rdm %% 5 +1 
) 

set "c=" 
set /p c=user 

if %c% EQU 1 echo %mhp% 
if %c% EQU 2 echo %mdmg% 
if %c% EQU 3 echo %mlvl% 

pause 

if "%lvl%" GEQ "6" if "%lvl%" LEQ "10" (
    set /a enemyno=rdm %% 6 +1 
    set /a mhp+=rdm %% 20 +1 
    set /a mdmg+=rdm %% 15 +1 
    set /a mlvl=rdm %% 10 +1 
) 

if "%lvl%" GEQ "11" if "%lvl%" LEQ "15" (
    set /a enemyno=rdm %% 9 +1 
    set /a mhp+=rdm %% 20 +1 
    set /a mdmg+=rdm %% 15 +1 
    set /a mlvl=rdm %% 16 +1 
) 

if "%lvl%" GEQ "16" if "%lvl%" LEQ "20" (
    set /a enemyno=rdm %% 12 +1 
    set /a mhp+=rdm %% 20 +1 
    set /a mdmg+=rdm %% 15 +1 
    set /a mlvl=rdm %% 22 +1 
) 

if "%lvl%" GEQ "21" if "%lvl%" LEQ "25" (
    set /a enemyno=rdm %% 15 +1 
    set /a mhp+=rdm %% 20 +1 
    set /a mdmg+=rdm %% 15 +1 
    set /a mlvl=rdm %% 30 +1 
) 

if "%lvl%" GEQ "26" if "%lvl%" LEQ "30" (
    set /a enemyno=rdm %% 18 +1 
    set /a mhp+=rdm %% 20 +1 
    set /a mdmg+=rdm %% 15 +1 
    set /a mlvl=rdm %% 35 +1 
) 

set "c=" 
set /p c=user 

if %c% EQU 1 echo %mhp% 
if %c% EQU 2 echo %mdmg% 
if %c% EQU 3 echo %mlvl% 
pause 

REM SANITY CHECK to make sure the variable is defined and within range. 
REM IF TRUE then goto enemy# 
IF DEFINED enemyno (
    if %enemyno% GEQ 1 (
     if %enemyno% LEQ 30 goto enemy%enemyno% 
    ) 
) 


goto prebattle