Fixing my basic Lua battle system [closed] - debugging

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This is a problem that I cannot seem to fix. I am a very new programmer and I love to code, however, I need help with this extremely basic battle system that I'm sure all you won't mind giving me. It isn't good looking or clean, so any tips on how I could shorten my code will also be greatly appreciated.
local function battle() -- All of this is 100% unfinished, by the way
n = math.random(10) + 1 -- Everybody's HP, enemy HP randomly generated number from 10 to 100
enemyhp = 10*n
herohp = 100
io.write("Your HP: ")
io.write(herohp)
io.write(" ")
io.flush()
io.write("Enemy HP: ")
io.write(enemyhp)
io.write(" ")
io.flush()
if enemyhp <= 0 then
print("You won!")
end
local function attack() -- Attacking the enemy or running away
print("|Attack|Flee|")
input = io.read()
if input = "attack" then -- This is where my error is
attackdamage = math.random(51)
if attackdamage = 51 then
print("Critical Hit!")
enemyhp - 100
else
enemyhp - attackdamage
print("Enemy took ")
io.write(attackdamage)
io.write(" damage!")
elseif input = "flee" then
print("You ran away!")
end
end
end
Thank you.

Answer 1

You are missing the end of your if block. It should be
if enemyhp <= 0 then
print("You won!")
end
Second problem is the line you point to: You need to compare using two equal signs (==) instead of one:
if input == "attack" then
Then when you assign value to some variable, you need to use one equal sign. Otherwise it is just expression with no meaning.
enemyhp = enemyhp - 100
and then the same errors repeat (you have one additional end in the end too). Full code, you can compile/run: http://ideone.com/dgPoZo
local function battle() -- All of this is 100% unfinished, by the way
n = math.random(10) + 1 -- Everybody's HP, enemy HP randomly generated number from 10 to 100
enemyhp = 10*n
herohp = 100
io.write("Your HP: ")
io.write(herohp)
io.write(" ")
io.flush()
io.write("Enemy HP: ")
io.write(enemyhp)
io.write(" ")
io.flush()
if enemyhp <= 0 then
print("You won!")
end
end
local function attack() -- Attacking the enemy or running away
print("|Attack|Flee|")
input = io.read()
if input == "attack" then -- This is where my error is
attackdamage = math.random(51)
if attackdamage == 51 then
print("Critical Hit!")
enemyhp = enemyhp - 100
else
enemyhp = enemyhp - attackdamage
print("Enemy took ")
io.write(attackdamage)
io.write(" damage!")
end
elseif input == "flee" then
print("You ran away!")
end
end