Always returning incorrect simple math lua

问题:

I have a very basic Lua script that asks a math question

math.randomseed(os.time())         print ("Let's play Math")         a = math.random(1,10)         b = math.random(1,10)         io.write("What is " .. a .. " + " .. b .. "?")         answer = io.read()         correct = (a + b)             if (answer == correct) then                 print ("Correct")             else                 print ("Wrong")                 print (correct) --For debug             end

For some reason, I am always getting "incorrect" even when answered correctly. I also print out the correct answer, just to make sure the program is handling the math correctly. Where is my mistake?

回答1:

answer contains a string and so is never equal to a number.

Just add

    answer = tonumber(answer)

after

    answer = io.read()

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