Added files via upload

Simple Calculator/Simple Calculator.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.24720.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Simple Calculator", "Simple Calculator\Simple Calculator.vcxproj", "{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}.Debug|x64.ActiveCfg = Debug|x64
+		{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}.Debug|x64.Build.0 = Debug|x64
+		{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}.Debug|x86.ActiveCfg = Debug|Win32
+		{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}.Debug|x86.Build.0 = Debug|Win32
+		{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}.Release|x64.ActiveCfg = Release|x64
+		{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}.Release|x64.Build.0 = Release|x64
+		{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}.Release|x86.ActiveCfg = Release|Win32
+		{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Simple Calculator/Simple Calculator/Calculator.hpp

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+//
+//  Calculator.hpp
+//  Simple Calculator
+//
+//  Created by Nicholas.L.Y on 2016/4/29.
+//  Copyright © 2016年 廖颖泓. All rights reserved.
+//
+#include <iostream>
+#include <string>
+using namespace std;
+bool isNumber(char a) {
+    return (a >= '0' && a <= '9');
+}
+bool isOperator(char a) {
+    return (a == '+' || a == '-');
+}
+class calculator {
+    public:
+        calculator() {}
+        ~calculator() {}
+        int calculate(string a) throw(ExpressionException,
+            IllegalSymbolException,
+            MissingOperatorException,
+            MissingOperandException,
+            EmptyExpressionException) {
+            if (a.empty()) throw EmptyExpressionException();
+            int len = a.length();
+            int amount = 0;
+            char _operator;
+            for (int i = 0; i < len; i++) {
+                if (!isNumber(a[i]) && !isOperator(a[i])) {
+                    throw IllegalSymbolException(i);
+                }
+                else if (isOperator(a[i]) && i % 2 == 0) {
+                    throw MissingOperandException(i);
+                }
+                else if (isNumber(a[i]) && i % 2 == 0) {
+                    if (i == 0) {
+                        amount = a[i] - '0';
+                    } else {
+                        if (_operator == '+') amount += a[i] - '0';
+                        else if (_operator == '-') amount -= a[i] - '0';
+                    }
+                }
+                else if (isOperator(a[i]) && i % 2 == 1) {
+                    _operator = a[i];
+                }
+                else if (isNumber(a[i]) && i % 2 == 1) {
+                    throw MissingOperatorException(i);
+                }
+            }
+            if (len % 2 == 0 && isOperator(a[len - 1])) {
+                throw MissingOperandException(len);
+            }
+            return amount;
+        }
+};

Simple Calculator/Simple Calculator/Debug/Simple C.4D2C7175.tlog/Simple Calculator.lastbuildstate

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+#TargetFrameworkVersion=v4.0:PlatformToolSet=v140:EnableManagedIncrementalBuild=false:VCToolArchitecture=Native32Bit:WindowsTargetPlatformVersion=8.1
+Debug|Win32|C:\Users\nicholasly\documents\visual studio 2015\Projects\Simple Calculator\|

Simple Calculator/Simple Calculator/Debug/Simple Calculator.log

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+  Source.cpp
+c:\users\nicholasly\documents\visual studio 2015\projects\simple calculator\simple calculator\calculator.hpp(25): warning C4290: C++ exception specification ignored except to indicate a function is not __declspec(nothrow)
+  Simple Calculator.vcxproj -> C:\Users\nicholasly\documents\visual studio 2015\Projects\Simple Calculator\Debug\Simple Calculator.exe
+  Simple Calculator.vcxproj -> C:\Users\nicholasly\documents\visual studio 2015\Projects\Simple Calculator\Debug\Simple Calculator.pdb (Partial PDB)

Simple Calculator/Simple Calculator/Exception.hpp

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+#ifndef EXCEPTION_HPP_
+#define EXCEPTION_HPP_
+#include <sstream>
+#include <string>
+
+class Utils {
+public:
+    static std::string int2String(int num) {
+        std::stringstream ss;
+        ss << num;
+        return ss.str();
+    }
+};
+
+class Exception {
+public:
+    virtual const std::string what() const throw() { return "Exception occors"; };
+};
+
+class ExpressionException : public Exception {
+public:
+    virtual const std::string what() const throw() {
+        return "ExpressionException";
+    }
+};
+
+class IllegalSymbolException : public ExpressionException {
+private:
+    int position;
+
+public:
+    IllegalSymbolException(int position) : position(position) {}
+    virtual const std::string what() const throw() {
+        return "IllegalSymbolException at position:" + Utils::int2String(position);
+    }
+};
+
+class MissingOperatorException : public ExpressionException {
+private:
+    int position;
+
+public:
+    MissingOperatorException(int position) : position(position) {}
+    virtual const std::string what() const throw() {
+        return "Expected operator at position:" + Utils::int2String(position);
+    }
+};
+
+class MissingOperandException : public ExpressionException {
+private:
+    int position;
+
+public:
+    MissingOperandException(int position) : position(position) {}
+    virtual const std::string what() const throw() {
+        return "Expected operand at position:" + Utils::int2String(position);
+    }
+};
+
+class EmptyExpressionException : public ExpressionException {
+public:
+    EmptyExpressionException() {}
+    virtual const std::string what() const throw() {
+        return "The expression is empty";
+    }
+};
+
+#endif

Simple Calculator/Simple Calculator/Simple Calculator.vcxproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
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+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{4D2C7175-4FBD-42C8-A84D-72AF9C818A84}</ProjectGuid>
+    <RootNamespace>SimpleCalculator</RootNamespace>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>MultiByte</CharacterSet>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
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+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="Calculator.hpp" />
+    <ClInclude Include="Exception.hpp" />
+  </ItemGroup>
+  <ItemGroup>
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+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
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Simple Calculator/Simple Calculator/Simple Calculator.vcxproj.filters

@@ -0,0 +1,30 @@
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+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="Exception.hpp">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Calculator.hpp">
+      <Filter>Header Files</Filter>
+    </ClInclude>
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+  <ItemGroup>
+    <ClCompile Include="Source.cpp">
+      <Filter>Source Files</Filter>
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+  </ItemGroup>
+</Project>

Simple Calculator/Simple Calculator/Source.cpp

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+#include "Exception.hpp"
+#include "Calculator.hpp"
+#include <iostream>
+#include <string>
+
+using std::cout;
+using std::cin;
+using std::endl;
+using std::string;
+
+int main() {
+    calculator c;
+    std::string str;
+    bool flag;
+
+    while (cin >> str) {
+        flag = false;
+        try {
+            cout << c.calculate(str) << endl;
+        }
+        catch (EmptyExpressionException e) {
+            cout << e.what() << endl;
+            flag = true;
+        }
+        catch (MissingOperatorException e) {
+            cout << e.what() << endl;
+            flag = true;
+        }
+        catch (MissingOperandException e) {
+            cout << e.what() << endl;
+            flag = true;
+        }
+        catch (IllegalSymbolException e) {
+            cout << e.what() << endl;
+            flag = true;
+        }
+        catch (ExpressionException e) {
+            cout << e.what() << endl;
+            flag = true;
+        }
+        catch (Exception e) {
+            // unhandled exception
+            throw e;
+        }
+        if (!flag) {
+            std::cout << "No exception happened!" << std::endl;
+        }
+    }
+
+    return 0;
+}