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This article mainly explains "how to write a number guessing game with Lua". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to write a number guessing game with Lua".

Lua code

First, you must set up a pseudo-random number generator so that your players have something unpredictable to try to guess. This is a two-step process: first, you generate a random seed based on the current time, and then select a number in the range of 1 to 100:

Math.randomseed (os.time ()) number = math.random (1100)

Next, create what Lua calls a table table to represent your players. A table is like an array in a Bash or an ArrayList in a Java. You can create a table and then assign child variables associated with the table. In this code, player is the table, and player.guess is an entry in the table:

Player = {} player.guess = 0

For debugging needs, you can output this secret number. This is not appropriate for games, but it is very helpful for testing. The comment in Lua is preceded by a double dash:

Print (number)-debug

Next, set up a while loop that runs forever when the value assigned to player.guess is not equal to the random number established at the beginning of the code. Currently, player.guess is set to 0, so it is not equal to number. Lua's inequality math operator is ~ =, which is unique, but you'll get used to it after a while.

In the process of this infinite loop, the game will first print a prompt to let the player understand the content of the game.

Next, Lua pauses and waits for the player to enter the number of guesses. Lua uses the io.read function to read data from files and standard input (stdin). You can assign the results of io.read to a variable that is dynamically created in the player table. The problem with dealing with player input is that even if it is a number, it is read as a string. You can use the tonumber () function to convert this input to an integer type and assign the result back to the player.guess variable with the initial value of 0:

While (player.guess ~ = number) do print ("Guess a number between 1 and 100") player.answer = io.read () player.guess = tonumber (player.answer)

Player.guess now contains a new value that will be compared to the random number in the if statement. Lua uses the keywords if, elseif, and else, and ends the statement with the keyword end:

If (player.guess > number) then print ("Too high") elseif (player.guess < number) then print ("Too low") else print ("That's right!") Os.exit () endend

Finally, the function os.exit () closes the application after success, and the keyword end is used twice: once to end the if statement and once to end the while loop.

Run the application

Run the game on the terminal:

$lua. / guess.lua96Guess a number between 1 and 1001Too lowGuess a number between 1 and 10099Too highGuess a number between 1 and 10096That's right!

okay!

Intuitive and consistent

As you can see from this code, Lua is very consistent and quite intuitive. Its table mechanism is a refreshing way of data association, and its syntax is simple and efficient. There are few wasted lines in the Lua code, in fact, there are at least two lines in this example that can be further optimized, but I want to demonstrate the data transformation as its step (maybe you can find the two lines I'm referring to and ReFactor them).

Lua is very easy to use and its documentation is pleasant to read, mainly because it doesn't have much content. You will learn the core language in a short period of time, and then you will be free to explore LuaRocks and discover great libraries contributed by others.

At this point, I believe you have a deeper understanding of "how to write a game of guessing numbers with Lua". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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