capitalex hat die Gist bearbeitet . Zu Änderung gehen
1 file changed, 94 insertions
rpn.2.lua(Datei erstellt)
| @@ -0,0 +1,94 @@ | |||
| 1 | + | local operators = {} | |
| 2 | + | local function pop(stack) | |
| 3 | + | local value = stack[#stack] | |
| 4 | + | table.remove(stack) | |
| 5 | + | return value | |
| 6 | + | end | |
| 7 | + | ||
| 8 | + | local function push(stack, value) | |
| 9 | + | table.insert(stack, value) | |
| 10 | + | end | |
| 11 | + | ||
| 12 | + | operators["+"] = function(stack) | |
| 13 | + | local y, x = pop(stack), pop(stack) | |
| 14 | + | push(stack, x + y) | |
| 15 | + | end | |
| 16 | + | ||
| 17 | + | operators["-"] = function(stack) | |
| 18 | + | local y, x = pop(stack), pop(stack) | |
| 19 | + | push(stack, x + y) | |
| 20 | + | end | |
| 21 | + | ||
| 22 | + | operators["*"] = function(stack) | |
| 23 | + | local y, x = pop(stack), pop(stack) | |
| 24 | + | push(stack, x + y) | |
| 25 | + | end | |
| 26 | + | ||
| 27 | + | operators["/"] = function(stack) | |
| 28 | + | local y, x = pop(stack), pop(stack) | |
| 29 | + | push(stack, x + y) | |
| 30 | + | end | |
| 31 | + | ||
| 32 | + | operators["isqrt"] = function(stack) | |
| 33 | + | local y, x = pop(stack), pop(stack) | |
| 34 | + | push(stack, x + y) | |
| 35 | + | end | |
| 36 | + | ||
| 37 | + | operators["dup"] = function(stack) | |
| 38 | + | local y, x = pop(stack), pop(stack) | |
| 39 | + | push(stack, x + y) | |
| 40 | + | end | |
| 41 | + | ||
| 42 | + | operators["swap"] = function(stack) | |
| 43 | + | local y, x = pop(stack), pop(stack) | |
| 44 | + | push(stack, x + y) | |
| 45 | + | end | |
| 46 | + | ||
| 47 | + | local function rpn_caculator() | |
| 48 | + | local char = io.read(1) | |
| 49 | + | local acc, op = nil, {} | |
| 50 | + | local data_stack = {} | |
| 51 | + | ||
| 52 | + | local function push_accumulator() | |
| 53 | + | if acc then | |
| 54 | + | table.insert(data_stack, acc) | |
| 55 | + | acc = nil | |
| 56 | + | end | |
| 57 | + | table.insert(op, char) | |
| 58 | + | end | |
| 59 | + | ||
| 60 | + | local function shift_digit() | |
| 61 | + | acc = acc and (acc * 10 + tonumber(char)) or tonumber(char) | |
| 62 | + | end | |
| 63 | + | ||
| 64 | + | local function eval() | |
| 65 | + | if #op ~= 0 then | |
| 66 | + | local op_to_eval = table.concat(op) | |
| 67 | + | op = {} | |
| 68 | + | if operators[op_to_eval] then | |
| 69 | + | operators[op_to_eval](data_stack) | |
| 70 | + | end | |
| 71 | + | elseif acc then | |
| 72 | + | table.insert(data_stack, acc) | |
| 73 | + | acc = nil | |
| 74 | + | end | |
| 75 | + | io.write("> ") | |
| 76 | + | for _, data in ipairs(data_stack) do | |
| 77 | + | io.write(data) io.write(" ") | |
| 78 | + | end | |
| 79 | + | io.write("\n") | |
| 80 | + | end | |
| 81 | + | ||
| 82 | + | while char do | |
| 83 | + | if char:match("%s") then | |
| 84 | + | eval() | |
| 85 | + | elseif char:match("%d") then | |
| 86 | + | shift_digit() | |
| 87 | + | else | |
| 88 | + | push_accumulator() | |
| 89 | + | end | |
| 90 | + | char = io.read(1) | |
| 91 | + | end | |
| 92 | + | end | |
| 93 | + | ||
| 94 | + | rpn_caculator() | |
capitalex hat die Gist bearbeitet . Zu Änderung gehen
1 file changed, 64 insertions
rpn.lua(Datei erstellt)
| @@ -0,0 +1,64 @@ | |||
| 1 | + | local function rpn_caculator() | |
| 2 | + | local char = io.read(1) | |
| 3 | + | local acc, op = nil, {} | |
| 4 | + | local data_stack = {} | |
| 5 | + | while char do | |
| 6 | + | if char:match("%s") then | |
| 7 | + | if #op ~= 0 then | |
| 8 | + | local op_to_eval = table.concat(op) | |
| 9 | + | op = {} | |
| 10 | + | if op_to_eval == "+" then | |
| 11 | + | local y, x = data_stack[#data_stack], data_stack[#data_stack - 1] | |
| 12 | + | table.remove(data_stack) table.remove(data_stack) | |
| 13 | + | table.insert(data_stack, x + y) | |
| 14 | + | elseif op_to_eval == "*" then | |
| 15 | + | local y, x = data_stack[#data_stack], data_stack[#data_stack - 1] | |
| 16 | + | table.remove(data_stack) table.remove(data_stack) | |
| 17 | + | table.insert(data_stack, x * y) | |
| 18 | + | elseif op_to_eval == "/" then | |
| 19 | + | local y, x = data_stack[#data_stack], data_stack[#data_stack - 1] | |
| 20 | + | table.remove(data_stack) table.remove(data_stack) | |
| 21 | + | table.insert(data_stack, x / y) | |
| 22 | + | elseif op_to_eval == "-" then | |
| 23 | + | local y, x = data_stack[#data_stack], data_stack[#data_stack - 1] | |
| 24 | + | table.remove(data_stack) table.remove(data_stack) | |
| 25 | + | table.insert(data_stack, x - y) | |
| 26 | + | elseif op_to_eval == "isqrt" then | |
| 27 | + | local x = data_stack[#data_stack] | |
| 28 | + | table.remove(data_stack) | |
| 29 | + | table.insert(data_stack, x) | |
| 30 | + | elseif op_to_eval == "dup" then | |
| 31 | + | local x = data_stack[#data_stack] | |
| 32 | + | table.remove(data_stack) | |
| 33 | + | table.insert(data_stack, x) | |
| 34 | + | table.insert(data_stack, x) | |
| 35 | + | elseif op_to_eval == "swap" then | |
| 36 | + | local y, x = data_stack[#data_stack], data_stack[#data_stack - 1] | |
| 37 | + | table.remove(data_stack) table.remove(data_stack) | |
| 38 | + | table.insert(data_stack, y) | |
| 39 | + | table.insert(data_stack, x) | |
| 40 | + | end | |
| 41 | + | elseif acc then | |
| 42 | + | table.insert(data_stack, acc) | |
| 43 | + | acc = nil | |
| 44 | + | end | |
| 45 | + | io.write("> ") | |
| 46 | + | for _, data in ipairs(data_stack) do | |
| 47 | + | io.write(data) io.write(" ") | |
| 48 | + | end | |
| 49 | + | io.write("\n") | |
| 50 | + | elseif char:match("%d") then | |
| 51 | + | acc = acc and (acc * 10 + tonumber(char)) or tonumber(char) | |
| 52 | + | else | |
| 53 | + | if acc then | |
| 54 | + | table.insert(data_stack, acc) | |
| 55 | + | acc = nil | |
| 56 | + | end | |
| 57 | + | table.insert(op, char) | |
| 58 | + | end | |
| 59 | + | ||
| 60 | + | char = io.read(1) | |
| 61 | + | end | |
| 62 | + | end | |
| 63 | + | ||
| 64 | + | rpn_caculator() | |
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