diff --git a/.gitignore b/.gitignore new file mode 100644 index 000000000..72a3feca5 --- /dev/null +++ b/.gitignore @@ -0,0 +1,174 @@ +# Created by https://www.toptal.com/developers/gitignore/api/java,intellij,gradle +# Edit at https://www.toptal.com/developers/gitignore?templates=java,intellij,gradle + +### Intellij ### +# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider +# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839 + +# User-specific stuff +.idea/**/workspace.xml +.idea/**/tasks.xml +.idea/**/usage.statistics.xml +.idea/**/dictionaries +.idea/**/shelf + +# AWS User-specific +.idea/**/aws.xml + +# Generated files +.idea/**/contentModel.xml + +# Sensitive or high-churn files +.idea/**/dataSources/ +.idea/**/dataSources.ids +.idea/**/dataSources.local.xml +.idea/**/sqlDataSources.xml +.idea/**/dynamic.xml +.idea/**/uiDesigner.xml +.idea/**/dbnavigator.xml + +# Gradle +.idea/**/gradle.xml +.idea/**/libraries + +# Gradle and Maven with auto-import +# When using Gradle or Maven with auto-import, you should exclude module files, +# since they will be recreated, and may cause churn. Uncomment if using +# auto-import. +# .idea/artifacts +# .idea/compiler.xml +# .idea/jarRepositories.xml +# .idea/modules.xml +# .idea/*.iml +# .idea/modules +# *.iml +# *.ipr + +# CMake +cmake-build-*/ + +# Mongo Explorer plugin +.idea/**/mongoSettings.xml + +# File-based project format +*.iws + +# IntelliJ +out/ + +# mpeltonen/sbt-idea plugin +.idea_modules/ + +# JIRA plugin +atlassian-ide-plugin.xml + +# Cursive Clojure plugin +.idea/replstate.xml + +# SonarLint plugin +.idea/sonarlint/ + +# Crashlytics plugin (for Android Studio and IntelliJ) +com_crashlytics_export_strings.xml +crashlytics.properties +crashlytics-build.properties +fabric.properties + +# Editor-based Rest Client +.idea/httpRequests + +# Android studio 3.1+ serialized cache file +.idea/caches/build_file_checksums.ser + +### Intellij Patch ### +# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721 + +# *.iml +# modules.xml +# .idea/misc.xml +# *.ipr + +# Sonarlint plugin +# https://plugins.jetbrains.com/plugin/7973-sonarlint +.idea/**/sonarlint/ + +# SonarQube Plugin +# https://plugins.jetbrains.com/plugin/7238-sonarqube-community-plugin +.idea/**/sonarIssues.xml + +# Markdown Navigator plugin +# https://plugins.jetbrains.com/plugin/7896-markdown-navigator-enhanced +.idea/**/markdown-navigator.xml +.idea/**/markdown-navigator-enh.xml +.idea/**/markdown-navigator/ + +# Cache file creation bug +# See https://youtrack.jetbrains.com/issue/JBR-2257 +.idea/$CACHE_FILE$ + +# CodeStream plugin +# https://plugins.jetbrains.com/plugin/12206-codestream +.idea/codestream.xml + +# Azure Toolkit for IntelliJ plugin +# https://plugins.jetbrains.com/plugin/8053-azure-toolkit-for-intellij +.idea/**/azureSettings.xml + +### Java ### +# Compiled class file +*.class + +# Log file +*.log + +# BlueJ files +*.ctxt + +# Mobile Tools for Java (J2ME) +.mtj.tmp/ + +# Package Files # +*.jar +*.war +*.nar +*.ear +*.zip +*.tar.gz +*.rar + +# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml +hs_err_pid* +replay_pid* + +### Gradle ### +.gradle +**/build/ +!src/**/build/ +build.gradle +settings.gradle +.idea +.gradle + +# Ignore Gradle GUI config +gradle-app.setting + +# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored) +!gradle-wrapper.jar + +# Avoid ignore Gradle wrappper properties +!gradle-wrapper.properties + +# Cache of project +.gradletasknamecache + +# Eclipse Gradle plugin generated files +# Eclipse Core +.project +# JDT-specific (Eclipse Java Development Tools) +.classpath + +### Gradle Patch ### +# Java heap dump +*.hprof + +# End of https://www.toptal.com/developers/gitignore/api/java,intellij,gradle \ No newline at end of file diff --git a/README.md b/README.md index c1c982e55..57951f173 100644 --- a/README.md +++ b/README.md @@ -25,15 +25,15 @@ ### 요구사항 - 콘솔로 구현입니다.(스윙으로 구현하시는 분들 계실까봐) - 객체지향적인 코드로 계산기 구현하기 - - [ ] 더하기 - - [ ] 빼기 - - [ ] 곱하기 - - [ ] 나누기 - - [ ] 우선순위(사칙연산) + - [x] 더하기 + - [x] 빼기 + - [x] 곱하기 + - [x] 나누기 + - [x] 우선순위(사칙연산) - [ ] 테스트 코드 구현하기 -- [ ] 계산 이력을 맵으로 데이터 저장기능 만들기 +- [x] 계산 이력을 맵으로 데이터 저장기능 만들기 - 애플리케이션이 동작하는 동안 데이터베이스 외에 데이터를 저장할 수 있는 방법을 고안해보세요. -- (선택) 정규식 사용 +- [x] 정규식 사용 ### 실행결과(콘솔) ``` diff --git a/build.gradle b/build.gradle new file mode 100644 index 000000000..3cae2d720 --- /dev/null +++ b/build.gradle @@ -0,0 +1,19 @@ +plugins { + id 'java' +} + +group 'org.example' +version '1.0-SNAPSHOT' + +repositories { + mavenCentral() +} + +dependencies { + testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1' + testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1' +} + +test { + useJUnitPlatform() +} \ No newline at end of file diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 000000000..41d9927a4 Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 000000000..41dfb8790 --- /dev/null +++ b/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,5 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/gradlew b/gradlew new file mode 100755 index 000000000..1b6c78733 --- /dev/null +++ b/gradlew @@ -0,0 +1,234 @@ +#!/bin/sh + +# +# Copyright © 2015-2021 the original authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +############################################################################## +# +# Gradle start up script for POSIX generated by Gradle. +# +# Important for running: +# +# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is +# noncompliant, but you have some other compliant shell such as ksh or +# bash, then to run this script, type that shell name before the whole +# command line, like: +# +# ksh Gradle +# +# Busybox and similar reduced shells will NOT work, because this script +# requires all of these POSIX shell features: +# * functions; +# * expansions «$var», «${var}», «${var:-default}», «${var+SET}», +# «${var#prefix}», «${var%suffix}», and «$( cmd )»; +# * compound commands having a testable exit status, especially «case»; +# * various built-in commands including «command», «set», and «ulimit». +# +# Important for patching: +# +# (2) This script targets any POSIX shell, so it avoids extensions provided +# by Bash, Ksh, etc; in particular arrays are avoided. +# +# The "traditional" practice of packing multiple parameters into a +# space-separated string is a well documented source of bugs and security +# problems, so this is (mostly) avoided, by progressively accumulating +# options in "$@", and eventually passing that to Java. +# +# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, +# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; +# see the in-line comments for details. +# +# There are tweaks for specific operating systems such as AIX, CygWin, +# Darwin, MinGW, and NonStop. +# +# (3) This script is generated from the Groovy template +# https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt +# within the Gradle project. +# +# You can find Gradle at https://github.com/gradle/gradle/. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) app_path=$APP_HOME$link ;; + esac +done + +APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit + +APP_NAME="Gradle" +APP_BASE_NAME=${0##*/} + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD=maximum + +warn () { + echo "$*" +} >&2 + +die () { + echo + echo "$*" + echo + exit 1 +} >&2 + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "$( uname )" in #( + CYGWIN* ) cygwin=true ;; #( + Darwin* ) darwin=true ;; #( + MSYS* | MINGW* ) msys=true ;; #( + NONSTOP* ) nonstop=true ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD=$JAVA_HOME/jre/sh/java + else + JAVACMD=$JAVA_HOME/bin/java + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then + case $MAX_FD in #( + max*) + MAX_FD=$( ulimit -H -n ) || + warn "Could not query maximum file descriptor limit" + esac + case $MAX_FD in #( + '' | soft) :;; #( + *) + ulimit -n "$MAX_FD" || + warn "Could not set maximum file descriptor limit to $MAX_FD" + esac +fi + +# Collect all arguments for the java command, stacking in reverse order: +# * args from the command line +# * the main class name +# * -classpath +# * -D...appname settings +# * --module-path (only if needed) +# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. + +# For Cygwin or MSYS, switch paths to Windows format before running java +if "$cygwin" || "$msys" ; then + APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) + CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) + + JAVACMD=$( cygpath --unix "$JAVACMD" ) + + # Now convert the arguments - kludge to limit ourselves to /bin/sh + for arg do + if + case $arg in #( + -*) false ;; # don't mess with options #( + /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath + [ -e "$t" ] ;; #( + *) false ;; + esac + then + arg=$( cygpath --path --ignore --mixed "$arg" ) + fi + # Roll the args list around exactly as many times as the number of + # args, so each arg winds up back in the position where it started, but + # possibly modified. + # + # NB: a `for` loop captures its iteration list before it begins, so + # changing the positional parameters here affects neither the number of + # iterations, nor the values presented in `arg`. + shift # remove old arg + set -- "$@" "$arg" # push replacement arg + done +fi + +# Collect all arguments for the java command; +# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of +# shell script including quotes and variable substitutions, so put them in +# double quotes to make sure that they get re-expanded; and +# * put everything else in single quotes, so that it's not re-expanded. + +set -- \ + "-Dorg.gradle.appname=$APP_BASE_NAME" \ + -classpath "$CLASSPATH" \ + org.gradle.wrapper.GradleWrapperMain \ + "$@" + +# Use "xargs" to parse quoted args. +# +# With -n1 it outputs one arg per line, with the quotes and backslashes removed. +# +# In Bash we could simply go: +# +# readarray ARGS < <( xargs -n1 <<<"$var" ) && +# set -- "${ARGS[@]}" "$@" +# +# but POSIX shell has neither arrays nor command substitution, so instead we +# post-process each arg (as a line of input to sed) to backslash-escape any +# character that might be a shell metacharacter, then use eval to reverse +# that process (while maintaining the separation between arguments), and wrap +# the whole thing up as a single "set" statement. +# +# This will of course break if any of these variables contains a newline or +# an unmatched quote. +# + +eval "set -- $( + printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | + xargs -n1 | + sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | + tr '\n' ' ' + )" '"$@"' + +exec "$JAVACMD" "$@" diff --git a/gradlew.bat b/gradlew.bat new file mode 100644 index 000000000..107acd32c --- /dev/null +++ b/gradlew.bat @@ -0,0 +1,89 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto execute + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/settings.gradle b/settings.gradle new file mode 100644 index 000000000..bcf30bf6c --- /dev/null +++ b/settings.gradle @@ -0,0 +1,2 @@ +rootProject.name = 'java-calculator' + diff --git a/src/main/java/calculator/Application.java b/src/main/java/calculator/Application.java new file mode 100644 index 000000000..ec9a851ea --- /dev/null +++ b/src/main/java/calculator/Application.java @@ -0,0 +1,16 @@ +package calculator; + +import calculator.engine.Repository.Memorizer; +import calculator.engine.model.InitCalculator; +import calculator.engine.model.PostfixCalculator; + +public class Application { + public static void main(String[] args) { + Console console = new Console(); + Memorizer repository = new Memorizer(); + InitCalculator initCalculator = new InitCalculator(); + PostfixCalculator postfixCalculator = new PostfixCalculator(); + new Calculator(console,console,repository,initCalculator, postfixCalculator).run(); + } +} + diff --git a/src/main/java/calculator/Calculator.java b/src/main/java/calculator/Calculator.java new file mode 100644 index 000000000..554e99db4 --- /dev/null +++ b/src/main/java/calculator/Calculator.java @@ -0,0 +1,45 @@ +package calculator; + +import calculator.engine.Repository.Memorizer; +import calculator.engine.io.Input; +import calculator.engine.io.Output; +import calculator.engine.model.InitCalculator; +import calculator.engine.model.PostfixCalculator; +import java.util.List; +public class Calculator implements Runnable{ + private final Input input; + private final Output output; + private final Memorizer repository; + private final InitCalculator initCalculator; + private final PostfixCalculator postfixCalculator; + public Calculator(Input input, Output output, Memorizer repository, InitCalculator initCalculator, PostfixCalculator postfixCalculator) { + this.input = input; + this.output = output; + this.repository = repository; + this.initCalculator = initCalculator; + this.postfixCalculator = postfixCalculator; + } + public void run() { + while (true) { + output.consoleMenu(); + int command = input.selectConsoleNumber(); + + switch (command) { + case 1: + output.MemoryCalculator(repository.getMemoroizer()); + break; + case 2: + String expression = input.inputCalculator(); + List result = InitCalculator.calculate(expression); + int s = postfixCalculator.calculate(result); + output.printCalculator(s); + String restoreValue = expression + " = " + s; + repository.storeHistory(restoreValue); + break; + default: + output.outputError(); + break; + } + } + } +} diff --git a/src/main/java/calculator/Console.java b/src/main/java/calculator/Console.java new file mode 100644 index 000000000..053c54a20 --- /dev/null +++ b/src/main/java/calculator/Console.java @@ -0,0 +1,45 @@ +package calculator; + +import calculator.engine.io.Input; +import calculator.engine.io.Output; +import java.util.LinkedHashMap; +import java.util.Scanner; + +public class Console implements Input, Output { + private final Scanner scanner = new Scanner(System.in); + private static final Validation validation = new Validation(); + @Override + public int selectConsoleNumber() { + int selectNumber = scanner.nextInt(); + try{ + return validation.checkConsoleNumber(selectNumber); + }catch (IllegalStateException e){ + System.out.println(e.getMessage()); + } + return selectNumber; + } + @Override + public String inputCalculator() { + scanner.nextLine(); + String initString = scanner.nextLine(); + return initString; + } + @Override + public void MemoryCalculator(LinkedHashMap memoryCalculator) { + memoryCalculator.values().forEach(System.out::println); + } + @Override + public void outputError() { + System.out.println("프로그램 오류가 발생하였습니다."); + } + @Override + public void consoleMenu() { + System.out.println("1. 조회"); + System.out.println("2. 계산\n"); + System.out.print("선택: "); + } + @Override + public void printCalculator(int result) { + System.out.println(result); + } +} \ No newline at end of file diff --git a/src/main/java/calculator/Validation.java b/src/main/java/calculator/Validation.java new file mode 100644 index 000000000..e735aa7da --- /dev/null +++ b/src/main/java/calculator/Validation.java @@ -0,0 +1,13 @@ +package calculator; + +import calculator.engine.enums.ConsoleMenu; + +public class Validation { + public static int checkConsoleNumber(int number){ + if (number == ConsoleMenu.ONE.MenuNumber || number == ConsoleMenu.TWO.MenuNumber) { + return number; + } else { + throw new IllegalArgumentException("1번과 2번 중 하나를 선택해주세요."); + } + } +} diff --git a/src/main/java/calculator/engine/Repository/Memorizer.java b/src/main/java/calculator/engine/Repository/Memorizer.java new file mode 100644 index 000000000..2d251988e --- /dev/null +++ b/src/main/java/calculator/engine/Repository/Memorizer.java @@ -0,0 +1,14 @@ +package calculator.engine.Repository; + +import java.util.LinkedHashMap; + +public class Memorizer { + private Integer startNumber = 0; + private final LinkedHashMap memoroizer = new LinkedHashMap<>(); + public void storeHistory(String initCalculator) { + this.memoroizer.put(startNumber++, initCalculator); + } + public LinkedHashMap getMemoroizer(){ + return memoroizer; + } +} diff --git a/src/main/java/calculator/engine/enums/ConsoleMenu.java b/src/main/java/calculator/engine/enums/ConsoleMenu.java new file mode 100644 index 000000000..be3806d67 --- /dev/null +++ b/src/main/java/calculator/engine/enums/ConsoleMenu.java @@ -0,0 +1,9 @@ +package calculator.engine.enums; + +public enum ConsoleMenu { + ONE(1),TWO(2); + public final int MenuNumber; + ConsoleMenu(int menuNumber) { + MenuNumber = menuNumber; + } +} \ No newline at end of file diff --git a/src/main/java/calculator/engine/enums/Operators.java b/src/main/java/calculator/engine/enums/Operators.java new file mode 100644 index 000000000..921c7d82b --- /dev/null +++ b/src/main/java/calculator/engine/enums/Operators.java @@ -0,0 +1,8 @@ +package calculator.engine.enums; +public enum Operators { + PLUS("+"),MINUS("-"),DIVISION("/"),MULTIPLICATION("*"); + public final String operator; + Operators(String operator) { + this.operator = operator; + } +} \ No newline at end of file diff --git a/src/main/java/calculator/engine/io/Input.java b/src/main/java/calculator/engine/io/Input.java new file mode 100644 index 000000000..ff40a8c8f --- /dev/null +++ b/src/main/java/calculator/engine/io/Input.java @@ -0,0 +1,6 @@ +package calculator.engine.io; + +public interface Input { + int selectConsoleNumber(); + String inputCalculator(); +} diff --git a/src/main/java/calculator/engine/io/Output.java b/src/main/java/calculator/engine/io/Output.java new file mode 100644 index 000000000..93b460f3e --- /dev/null +++ b/src/main/java/calculator/engine/io/Output.java @@ -0,0 +1,10 @@ +package calculator.engine.io; + +import java.util.LinkedHashMap; + +public interface Output { + void printCalculator(int result); + void consoleMenu(); + void MemoryCalculator(LinkedHashMap memoryCalculator); + void outputError(); +} \ No newline at end of file diff --git a/src/main/java/calculator/engine/model/InitCalculator.java b/src/main/java/calculator/engine/model/InitCalculator.java new file mode 100644 index 000000000..cfe368db0 --- /dev/null +++ b/src/main/java/calculator/engine/model/InitCalculator.java @@ -0,0 +1,46 @@ +package calculator.engine.model; + +import java.util.ArrayList; +import java.util.List; +import java.util.Stack; +import java.util.regex.Pattern; + +public class InitCalculator { + public static List calculate(String infixCalculator) { + Stack stack = new Stack<>(); + List postfixExpression = new ArrayList<>(); + + for (String ch : infixCalculator.split(" ")) { + if(Pattern.matches("[0-9]+",ch)){ + postfixExpression.add(ch); + } else if (ch.equals("(")) { + stack.push(ch); + while (!stack.isEmpty() && !stack.peek().equals("(")) { + postfixExpression.add(stack.pop()); + } + stack.pop(); + } else { + while (!stack.isEmpty() && getPrecedence(ch) <= getPrecedence(stack.peek())) { + postfixExpression.add(stack.pop()); + } + stack.push(ch); + } + } + while (!stack.isEmpty()) { + postfixExpression.add(stack.pop()); + } + return postfixExpression; + } + private static int getPrecedence(String operator) { + switch (operator) { + case "+": + case "-": + return 1; + case "*": + case "/": + return 2; + default: + return 0; + } + } +} diff --git a/src/main/java/calculator/engine/model/PostfixCalculator.java b/src/main/java/calculator/engine/model/PostfixCalculator.java new file mode 100644 index 000000000..27631067b --- /dev/null +++ b/src/main/java/calculator/engine/model/PostfixCalculator.java @@ -0,0 +1,41 @@ +package calculator.engine.model; + +import java.util.List; +import java.util.Stack; + +public class PostfixCalculator { + public int calculate(List postfixExpression) { + Stack operandStack = new Stack<>(); + + for (String operand : postfixExpression) { + if (operand.matches("^?\\d*$")) { + operandStack.push(Integer.parseInt(operand)); + } else { + int operand2 = operandStack.pop(); + int operand1 = operandStack.pop(); + int result = 0; + + switch (operand) { + case "+": + result = operand1 + operand2; + break; + case "-": + result = operand1 - operand2; + break; + case "*": + result = operand1 * operand2; + break; + case "/": + if (operand2 == 0) { + throw new ArithmeticException("Divide by zero!"); + } + result = operand1 / operand2; + break; + } + + operandStack.push(result); + } + } + return operandStack.pop(); + } +}