diff --git a/.classpath b/.classpath
index 21978948803ca839b6b2778a4f478211edc5a4f1..ba1d5dae5e61b0b60dff40843179431e9a4dd94a 100644
--- a/.classpath
+++ b/.classpath
@@ -6,5 +6,6 @@
+
diff --git a/.metadata/.lock b/.metadata/.lock
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/.metadata/.log b/.metadata/.log
new file mode 100644
index 0000000000000000000000000000000000000000..15cdd93ca70952aacf5c196bb2bfa58fe989b98b
--- /dev/null
+++ b/.metadata/.log
@@ -0,0 +1,41 @@
+!SESSION 2021-05-30 17:37:37.778 -----------------------------------------------
+eclipse.buildId=4.14.0.I20191210-0610
+java.version=14.0.1
+java.vendor=Oracle Corporation
+BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=zh_CN
+Framework arguments: -product org.eclipse.epp.package.jee.product
+Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product
+
+!ENTRY org.eclipse.egit.ui 2 0 2021-05-30 17:38:15.006
+!MESSAGE Warning: The environment variable HOME is not set. The following directory will be used to store the Git
+user global configuration and to define the default location to store repositories: 'C:\Users\86151'. If this is
+not correct please set the HOME environment variable and restart Eclipse. Otherwise Git for Windows and
+EGit might behave differently since they see different configuration options.
+This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.
+!SESSION 2021-06-09 21:22:01.931 -----------------------------------------------
+eclipse.buildId=4.14.0.I20191210-0610
+java.version=14.0.1
+java.vendor=Oracle Corporation
+BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=zh_CN
+Framework arguments: -product org.eclipse.epp.package.jee.product
+Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product
+
+!ENTRY org.eclipse.egit.ui 2 0 2021-06-09 21:22:29.037
+!MESSAGE Warning: The environment variable HOME is not set. The following directory will be used to store the Git
+user global configuration and to define the default location to store repositories: 'C:\Users\86151'. If this is
+not correct please set the HOME environment variable and restart Eclipse. Otherwise Git for Windows and
+EGit might behave differently since they see different configuration options.
+This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.
+
+!ENTRY org.eclipse.core.jobs 4 2 2021-06-09 21:23:16.820
+!MESSAGE 在“Deferred Early Start”期间发生了内部错误。
+!STACK 0
+java.lang.NullPointerException
+ at org.eclipse.core.internal.runtime.InternalPlatform.getLog(InternalPlatform.java:361)
+ at org.eclipse.core.runtime.Plugin.getLog(Plugin.java:237)
+ at org.eclipse.oomph.util.OomphPlugin.getLog(OomphPlugin.java:210)
+ at org.eclipse.oomph.util.OomphPlugin.log(OomphPlugin.java:225)
+ at org.eclipse.oomph.util.OomphPlugin.log(OomphPlugin.java:236)
+ at org.eclipse.oomph.internal.ui.EarlyStart.run(EarlyStart.java:116)
+ at org.eclipse.oomph.internal.ui.EarlyStart$1.run(EarlyStart.java:91)
+ at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
diff --git a/.metadata/.mylyn/repositories.xml.zip b/.metadata/.mylyn/repositories.xml.zip
new file mode 100644
index 0000000000000000000000000000000000000000..f57016db3d5514a0a4764465dd5ffa147a5e3208
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diff --git a/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/history.version b/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/history.version
new file mode 100644
index 0000000000000000000000000000000000000000..25cb955ba23571f6fefd57cecf5f67454210bbc8
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/history.version
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/properties.index b/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/properties.index
new file mode 100644
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diff --git a/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/properties.version b/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/properties.version
new file mode 100644
index 0000000000000000000000000000000000000000..6b2aaa7640726588bcd3d57e1de4b1315b7f315e
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.resources/.root/.indexes/properties.version
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/.metadata/.plugins/org.eclipse.core.resources/.root/2.tree b/.metadata/.plugins/org.eclipse.core.resources/.root/2.tree
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diff --git a/.metadata/.plugins/org.eclipse.core.resources/.safetable/org.eclipse.core.resources b/.metadata/.plugins/org.eclipse.core.resources/.safetable/org.eclipse.core.resources
new file mode 100644
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diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.core.resources.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.core.resources.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..dffc6b51349681ffb272ab899b3ef7c402cf49f9
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,2 @@
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+version=1
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.ui.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.ui.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..1a86a40898d9e440690aec0103d0583a788ec356
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jdt.ui.prefs
@@ -0,0 +1,9 @@
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+content_assist_proposals_foreground=0,0,0
+eclipse.preferences.version=1
+org.eclipse.jdt.internal.ui.navigator.layout=2
+org.eclipse.jdt.internal.ui.navigator.librariesnode=true
+org.eclipse.jdt.ui.formatterprofiles.version=18
+spelling_locale_initialized=true
+useAnnotationsPrefPage=true
+useQuickDiffPrefPage=true
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jsch.core.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jsch.core.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..d56c53f151bf27a16afdcdce18f4154bdfe705c7
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jsch.core.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.jsch.core.hasChangedDefaultWin32SshHome=true
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jst.j2ee.webservice.ui.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jst.j2ee.webservice.ui.prefs
new file mode 100644
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--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.jst.j2ee.webservice.ui.prefs
@@ -0,0 +1,2 @@
+areThereWebServices=false
+eclipse.preferences.version=1
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.m2e.discovery.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.m2e.discovery.prefs
new file mode 100644
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@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.m2e.discovery.pref.projects=
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.context.core.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.context.core.prefs
new file mode 100644
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--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.context.core.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+mylyn.attention.migrated=true
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.monitor.ui.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.monitor.ui.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..8d462a6cf4a5380e037352977c750defd2aaed72
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.monitor.ui.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.mylyn.monitor.activity.tracking.enabled.checked=true
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.tasks.ui.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.tasks.ui.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..5330e43bb76d5008e14605079f4ac6cf02e1b5cc
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.mylyn.tasks.ui.prefs
@@ -0,0 +1,4 @@
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+migrated.task.repositories.secure.store=true
+org.eclipse.mylyn.tasks.ui.filters.nonmatching=true
+org.eclipse.mylyn.tasks.ui.filters.nonmatching.encouraged=true
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.rse.core.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.rse.core.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..a622217995370392b866642a4ecce7f167fff9be
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.rse.core.prefs
@@ -0,0 +1,2 @@
+activeuserprofiles=LAPTOP-9I63FDQU;Team
+eclipse.preferences.version=1
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.ide.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.ide.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..1d63e07b226cd5eaa5a157b8f125719b97548928
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.ide.prefs
@@ -0,0 +1,5 @@
+PROBLEMS_FILTERS_MIGRATE=true
+eclipse.preferences.version=1
+platformState=1576812137725
+quickStart=false
+tipsAndTricks=true
diff --git a/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.workbench.prefs b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.workbench.prefs
new file mode 100644
index 0000000000000000000000000000000000000000..61df215ad91df20062b8dc96e835316f8dc579c9
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.ui.workbench.prefs
@@ -0,0 +1,4 @@
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+//org.eclipse.ui.commands/state/org.eclipse.wst.xml.views.XPathView.processor.xpathprocessor/org.eclipse.ui.commands.radioState=xpath10
+PLUGINS_NOT_ACTIVATED_ON_STARTUP=;org.eclipse.m2e.discovery;
+eclipse.preferences.version=1
diff --git a/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi b/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi
new file mode 100644
index 0000000000000000000000000000000000000000..9c4f7bf4be080cc1f029e280cdbd674a4add8cf9
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+++ b/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xmi
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new file mode 100644
index 0000000000000000000000000000000000000000..3de398e8f2856ff30f4c5dd9cf8cfd66b137fcc8
Binary files /dev/null and b/.metadata/.plugins/org.eclipse.jdt.core/variablesAndContainers.dat differ
diff --git a/.metadata/.plugins/org.eclipse.jdt.ui/OpenTypeHistory.xml b/.metadata/.plugins/org.eclipse.jdt.ui/OpenTypeHistory.xml
new file mode 100644
index 0000000000000000000000000000000000000000..a4ee3cbc9a7fb4242b2f2becb901674986dc4389
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.jdt.ui/OpenTypeHistory.xml
@@ -0,0 +1,2 @@
+
+
diff --git a/.metadata/.plugins/org.eclipse.jdt.ui/QualifiedTypeNameHistory.xml b/.metadata/.plugins/org.eclipse.jdt.ui/QualifiedTypeNameHistory.xml
new file mode 100644
index 0000000000000000000000000000000000000000..9e390f501d055f97f1a023eb11d0916f4992c3e9
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.jdt.ui/QualifiedTypeNameHistory.xml
@@ -0,0 +1,2 @@
+
+
diff --git a/.metadata/.plugins/org.eclipse.m2e.logback.configuration/0.log b/.metadata/.plugins/org.eclipse.m2e.logback.configuration/0.log
new file mode 100644
index 0000000000000000000000000000000000000000..b02f8f2f7d79bf9949508037de0109b36472387d
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.m2e.logback.configuration/0.log
@@ -0,0 +1,3 @@
+2021-05-30 17:38:14,679 [Worker-4: Loading available Gradle versions] INFO o.e.b.c.i.u.g.PublishedGradleVersions - Gradle version information cache is out-of-date. Trying to update.
+2021-06-09 21:22:28,662 [Worker-4: Loading available Gradle versions] INFO o.e.b.c.i.u.g.PublishedGradleVersions - Gradle version information cache is out-of-date. Trying to update.
+2021-06-09 21:22:38,920 [Worker-4: Loading available Gradle versions] INFO o.e.b.c.i.u.g.PublishedGradleVersions - Updating Gradle version information cache failed. Using outdated cache.
diff --git a/.metadata/.plugins/org.eclipse.m2e.logback.configuration/logback.1.14.0.20191209-1925.xml b/.metadata/.plugins/org.eclipse.m2e.logback.configuration/logback.1.14.0.20191209-1925.xml
new file mode 100644
index 0000000000000000000000000000000000000000..e33758c3a3653d6c8230e40ef86ec78ac44b3374
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.m2e.logback.configuration/logback.1.14.0.20191209-1925.xml
@@ -0,0 +1,43 @@
+
+
+
+ %date [%thread] %-5level %logger{35} - %msg%n
+
+
+ OFF
+
+
+
+
+ ${org.eclipse.m2e.log.dir}/0.log
+
+ ${org.eclipse.m2e.log.dir}/%i.log
+ 1
+ 10
+
+
+ 100MB
+
+
+ %date [%thread] %-5level %logger{35} - %msg%n
+
+
+
+
+
+ WARN
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/.metadata/.plugins/org.eclipse.oomph.setup/workspace.setup b/.metadata/.plugins/org.eclipse.oomph.setup/workspace.setup
new file mode 100644
index 0000000000000000000000000000000000000000..1f73e14c1a55d41d85ea916a87b57b3251cb1681
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.oomph.setup/workspace.setup
@@ -0,0 +1,6 @@
+
+
diff --git a/.metadata/.plugins/org.eclipse.rse.core/.log b/.metadata/.plugins/org.eclipse.rse.core/.log
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/.metadata/.plugins/org.eclipse.rse.core/initializerMarks/org.eclipse.rse.internal.core.RSELocalConnectionInitializer.mark b/.metadata/.plugins/org.eclipse.rse.core/initializerMarks/org.eclipse.rse.internal.core.RSELocalConnectionInitializer.mark
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/.metadata/.plugins/org.eclipse.tips.ide/dialog_settings.xml b/.metadata/.plugins/org.eclipse.tips.ide/dialog_settings.xml
new file mode 100644
index 0000000000000000000000000000000000000000..5ca0b7769013920648b17f3f51ba3e88139fdf0e
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.tips.ide/dialog_settings.xml
@@ -0,0 +1,3 @@
+
+
diff --git a/.metadata/.plugins/org.eclipse.tm.terminal.view.ui/.executables/data.properties b/.metadata/.plugins/org.eclipse.tm.terminal.view.ui/.executables/data.properties
new file mode 100644
index 0000000000000000000000000000000000000000..87b2e2de684a276555129d74c88f9f4d7bf9df91
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.tm.terminal.view.ui/.executables/data.properties
@@ -0,0 +1,6 @@
+#Sun May 30 17:38:01 CST 2021
+0.Icon=D\:\\Git\\mingw64\\share\\git\\git-for-windows.ico
+0.Path=D\:\\Git\\bin\\sh.exe
+0.Translate=true
+0.Args=--login -i
+0.Name=Git Bash
diff --git a/.metadata/.plugins/org.eclipse.ui.ide/dialog_settings.xml b/.metadata/.plugins/org.eclipse.ui.ide/dialog_settings.xml
new file mode 100644
index 0000000000000000000000000000000000000000..e646053f0df82405a4425b949a094eeaf8e52b06
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.ui.ide/dialog_settings.xml
@@ -0,0 +1,12 @@
+
+
diff --git a/.metadata/.plugins/org.eclipse.ui.intro/introstate b/.metadata/.plugins/org.eclipse.ui.intro/introstate
new file mode 100644
index 0000000000000000000000000000000000000000..236d56cbad8379abdb8f5fb599717d93cd38201d
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.ui.intro/introstate
@@ -0,0 +1,2 @@
+
+
\ No newline at end of file
diff --git a/.metadata/.plugins/org.eclipse.ui.workbench/dialog_settings.xml b/.metadata/.plugins/org.eclipse.ui.workbench/dialog_settings.xml
new file mode 100644
index 0000000000000000000000000000000000000000..5ca0b7769013920648b17f3f51ba3e88139fdf0e
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.ui.workbench/dialog_settings.xml
@@ -0,0 +1,3 @@
+
+
diff --git a/.metadata/.plugins/org.eclipse.ui.workbench/workingsets.xml b/.metadata/.plugins/org.eclipse.ui.workbench/workingsets.xml
new file mode 100644
index 0000000000000000000000000000000000000000..43c2de616fa41c9ee6b5ddd34d9265f563041f96
--- /dev/null
+++ b/.metadata/.plugins/org.eclipse.ui.workbench/workingsets.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.metadata/version.ini b/.metadata/version.ini
new file mode 100644
index 0000000000000000000000000000000000000000..c1dda97b230a72c9ea625f156257437c4ad7a17d
--- /dev/null
+++ b/.metadata/version.ini
@@ -0,0 +1,3 @@
+#Wed Jun 09 21:22:12 CST 2021
+org.eclipse.core.runtime=2
+org.eclipse.platform=4.14.0.v20191210-0610
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index bb35fa0a87b032ee9d0b128004c1edbd464f07bf..c59d0c6a9641314a2958f94860a9c0aaa4fcd620 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -1,5 +1,6 @@
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
org.eclipse.jdt.core.compiler.compliance=1.8
@@ -7,5 +8,8 @@ org.eclipse.jdt.core.compiler.debug.lineNumber=generate
org.eclipse.jdt.core.compiler.debug.localVariable=generate
org.eclipse.jdt.core.compiler.debug.sourceFile=generate
org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=disabled
org.eclipse.jdt.core.compiler.source=1.8
diff --git a/assets/images/div0.gif b/assets/images/div0.gif
new file mode 100644
index 0000000000000000000000000000000000000000..4fb6d10207408e427c1aff514d98cb22ef64a9f7
Binary files /dev/null and b/assets/images/div0.gif differ
diff --git a/assets/images/normal.gif b/assets/images/normal.gif
new file mode 100644
index 0000000000000000000000000000000000000000..51396b529442f04e90a41b2748e4e2f09064c1e5
Binary files /dev/null and b/assets/images/normal.gif differ
diff --git a/assets/images/number_0.jpg b/assets/images/number_0.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..57a5a8a7ab8c5042124fd5263af974bdff1d3153
Binary files /dev/null and b/assets/images/number_0.jpg differ
diff --git a/assets/images/number_1.jpg b/assets/images/number_1.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..e527045344468aa0248c3bd5c26ec46320deab3b
Binary files /dev/null and b/assets/images/number_1.jpg differ
diff --git a/assets/images/number_2.jpg b/assets/images/number_2.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..879fd16cba9726e85c2375bdb1adb1cca792e222
Binary files /dev/null and b/assets/images/number_2.jpg differ
diff --git a/assets/images/number_3.jpg b/assets/images/number_3.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..e79a4fef7f4d8f724c655f43578e7b6c13f9c189
Binary files /dev/null and b/assets/images/number_3.jpg differ
diff --git a/assets/images/number_4.jpg b/assets/images/number_4.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..a4d5bd0b1b1cfb6d7d111f894e2103a57d035b98
Binary files /dev/null and b/assets/images/number_4.jpg differ
diff --git a/assets/images/number_5.jpg b/assets/images/number_5.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..5ec901eb7f6fa316c9841f8332a0a4860dd47502
Binary files /dev/null and b/assets/images/number_5.jpg differ
diff --git a/assets/images/number_6.jpg b/assets/images/number_6.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..8dee7fe772d78eaecfab49dc0d581755c33993e1
Binary files /dev/null and b/assets/images/number_6.jpg differ
diff --git a/assets/images/number_7.jpg b/assets/images/number_7.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..3aa2fe12893363e9e4e6c394d9753f9eefcd4f7a
Binary files /dev/null and b/assets/images/number_7.jpg differ
diff --git a/assets/images/number_8.jpg b/assets/images/number_8.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..388e1af4a8287d566c310f87e128ed98654dfbad
Binary files /dev/null and b/assets/images/number_8.jpg differ
diff --git a/assets/images/number_9.jpg b/assets/images/number_9.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..07294ff93412654c14bf6d7d40f7a25715504e63
Binary files /dev/null and b/assets/images/number_9.jpg differ
diff --git a/assets/images/sign_negative.jpg b/assets/images/sign_negative.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..af337c3a6eddb00efd5d9de52eaf1803fb5359da
Binary files /dev/null and b/assets/images/sign_negative.jpg differ
diff --git a/assets/images/sign_point.jpg b/assets/images/sign_point.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..1b9cfe00d5ba32ed568cb7cf762faee6866f8e6b
Binary files /dev/null and b/assets/images/sign_point.jpg differ
diff --git a/src/caltulator/CalculatorButton.java b/src/caltulator/CalculatorButton.java
new file mode 100644
index 0000000000000000000000000000000000000000..6da1f8ca423f55a943b69f7ba082055730aa0eb9
--- /dev/null
+++ b/src/caltulator/CalculatorButton.java
@@ -0,0 +1,29 @@
+package caltulator;
+
+import java.awt.*;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+
+public class CalculatorButton{
+ public static JButton getButton(String fileName) {
+ JButton btn = new JButton();
+ //ͼ
+ ImageIcon icon = new ImageIcon("assets/images/"+fileName+".jpg");
+ Image temp = icon.getImage().getScaledInstance(100,90,Image.SCALE_DEFAULT);
+ icon.setImage(temp);
+ //ͼ
+ btn.setIcon(icon);
+ btn.setOpaque(false);
+ btn.setContentAreaFilled(false);
+ btn.setMargin(new Insets(0, 0, 0, 0));
+ btn.setBackground(new Color(206,236,245));
+ return btn;
+ }
+
+ public static JButton buttonFactory(String text,int size) {
+ JButton button = new JButton(text);
+ button.setFont(new Font("", Font.PLAIN, size));
+ button.setBackground(new Color(240,248,255));
+ return button;
+ }
+}
diff --git a/src/caltulator/CalculatorFrame.java b/src/caltulator/CalculatorFrame.java
new file mode 100644
index 0000000000000000000000000000000000000000..c5e3261e201eaf1f958a5c0acb7f234342e6fd99
--- /dev/null
+++ b/src/caltulator/CalculatorFrame.java
@@ -0,0 +1,258 @@
+package caltulator;
+
+import java.awt.*;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+import java.math.BigDecimal;
+import java.text.DecimalFormat;
+import java.util.ArrayList;
+
+import javax.swing.*;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.JTextComponent;
+import javax.swing.text.PlainDocument;
+
+import listener.*;
+
+public class CalculatorFrame extends JFrame {
+
+ /**
+ * @param ʽ
+ */
+ JTextField input;
+
+ /**
+ * @param ť
+ */
+ JPanel centerP;
+
+ /**
+ * @param
+ */
+ JPanel northP;
+
+ private static double a=0;
+
+ private static double c=0;
+
+ private static String b=null;
+
+ private static boolean d=false;
+
+ private static JLabel icon;
+
+ ArrayList buttons = new ArrayList();
+
+
+ public static double getA() {
+ return a;
+ }
+
+ public static void setA(double a) {
+ CalculatorFrame.a = a;
+ }
+
+ public static double getC() {
+ return c;
+ }
+
+ public static void setC(double c) {
+ CalculatorFrame.c = c;
+ }
+
+ public static String getB() {
+ return b;
+ }
+
+ public static void setB(String b) {
+ CalculatorFrame.b = b;
+ }
+
+ public static boolean getD() {
+ return d;
+ }
+
+ public static void setD(boolean d) {
+ CalculatorFrame.d = d;
+ }
+
+ public static void toggleD(){
+ boolean d=CalculatorFrame.getD();
+ if(d) {
+ CalculatorFrame.setD(false);
+ }
+ else {
+ CalculatorFrame.setD(true);
+ }
+ }
+
+ public CalculatorFrame() {
+ getContentPane().setLayout(new BorderLayout());
+ init();
+ setVisible(true);
+ setTitle("CinnamonDogCalculator");
+ setSize(450,660);
+ setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+ }
+
+ void init(){
+ this.setBackground(new Color(206,236,245));
+
+ input=new JTextField("",15);
+
+ input.setFont(new Font("", Font.PLAIN, 40));
+ input.setBackground(new Color(240, 248, 255));
+ input.setDocument(new PlainDocument() {
+
+ @Override
+ public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
+ String text = input.getText();
+ if (text.length() + str.length() > 15) {
+ input.setText("");
+ ImageIcon errIcon = new ImageIcon("assets/images/div0.gif");
+ Image temp = errIcon.getImage().getScaledInstance(107, 80, Image.SCALE_DEFAULT);
+ errIcon.setImage(temp);
+ CalculatorFrame.getIcon().setIcon(errIcon);
+ return;
+ }
+
+
+ super.insertString(offs, str, a);
+ }
+ });
+
+
+ ImageIcon icon = new ImageIcon("assets/images/normal.gif");
+ Image temp = icon.getImage().getScaledInstance(108,80,Image.SCALE_DEFAULT);
+ icon.setImage(temp);
+ JLabel jl=new JLabel(icon);
+ this.icon = jl;
+
+ northP=new JPanel();
+ northP.setBackground(new Color(173, 216, 230));
+ northP.setLayout(new FlowLayout());
+ northP.add(input);
+ northP.add(jl);
+ northP.setSize(450, 50);
+ input.setPreferredSize(new Dimension(300, 80));
+
+ centerP=new JPanel();
+ centerP.setBackground(new Color(255, 255, 255));
+ centerP.setLayout(new GridLayout(5,4));
+
+
+ addButton(CalculatorButton.buttonFactory("CE", 60));
+
+ addButton(CalculatorButton.buttonFactory("C", 60));
+ addButton(CalculatorButton.buttonFactory("%", 60));
+ addButton(CalculatorButton.buttonFactory("", 60));
+
+ addButton(CalculatorButton.getButton("number_1"));
+ addButton(CalculatorButton.getButton("number_2"));
+ addButton(CalculatorButton.getButton("number_3"));
+ addButton(CalculatorButton.buttonFactory("+",75));
+
+ addButton(CalculatorButton.getButton("number_4"));
+ addButton(CalculatorButton.getButton("number_5"));
+ addButton(CalculatorButton.getButton("number_6"));
+ addButton(CalculatorButton.buttonFactory("-",75));
+
+ addButton(CalculatorButton.getButton("number_7"));
+ addButton(CalculatorButton.getButton("number_8"));
+ addButton(CalculatorButton.getButton("number_9"));
+
+ addButton(CalculatorButton.buttonFactory("",65));
+
+ addButton(CalculatorButton.buttonFactory("",75));
+
+ addButton(CalculatorButton.getButton("number_0"));
+
+ addButton(CalculatorButton.buttonFactory(".",75));
+
+ addButton(CalculatorButton.buttonFactory("=",75));
+
+ for(int i=0;i