mirror of
https://github.com/CCLeonOS/LeonOS.git
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Leonmmcoset
fb33b53b42
添加包管理器核心程序(pkg.lua)及相关支持文件 - 实现包安装、更新、移除、列表、搜索等功能 - 添加包元数据结构和本地存储管理 - 包含示例包和命令补全支持 - 更新系统版本至0.3.0
89 lines
2.3 KiB
Lua
89 lines
2.3 KiB
Lua
-- Calculator program calc.lua
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local term = require("term")
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local keys = require("keys")
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local colors = require("colors")
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-- Function to draw top bar
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local function drawTopBar()
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-- Get terminal size
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local w, h = term.getSize()
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-- Save cursor position
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local cx, cy = term.getCursorPos()
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-- Set top bar color
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term.setTextColor(colors.yellow)
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term.setBackgroundColor(colors.blue)
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-- Move to top-left corner
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term.setCursorPos(1, 1)
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-- Draw top bar with centered title
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local title = "=== LeonOS Calculator ==="
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local padding = math.floor((w - #title) / 2)
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term.write(string.rep(" ", padding) .. title .. string.rep(" ", padding))
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-- Reset colors
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term.setTextColor(colors.white)
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term.setBackgroundColor(colors.black)
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-- Restore cursor position
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term.setCursorPos(cx, cy)
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end
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-- Clear screen and show UI
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term.clear()
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drawTopBar()
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-- Move cursor to below top bar and show instructions
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term.setCursorPos(1, 3)
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print("Enter an expression, press Enter to calculate (type 'q' to quit)")
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print("Supports +, -, *, /, ^(exponent), %(modulus), and parentheses")
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print("---------------------------")
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while true do
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-- Show prompt
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io.write("> ")
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local input = io.read()
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-- Check for exit
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if input == "q" or input == "quit" then
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break
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end
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-- Check for clear screen
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if input == "clear" then
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term.clear()
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drawTopBar()
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-- Move cursor to below top bar and show instructions
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term.setCursorPos(1, 3)
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print("Enter an expression, press Enter to calculate (type 'q' to quit)")
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print("Supports +, -, *, /, ^(exponent), %(modulus), and parentheses")
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print("---------------------------")
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goto continue
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end
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-- Calculate expression
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local success, result = pcall(function()
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-- Replace Chinese parentheses with English ones
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input = input:gsub("（", "("):gsub("）", ")")
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-- Safely execute expression
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local func = load("return " .. input)
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if func then
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return func()
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else
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error("Invalid expression")
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end
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end)
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-- Show result
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if success then
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print("Result: " .. result)
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else
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print("Error: " .. tostring(result))
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end
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::continue::
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end
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print("Calculator has exited") |