Matrix Multiply Vector

Coding implementation: n order Matrix multiply n order Vector return n order Vector. Use google test as unit test framework.
elixir67 · May 13, 2012 · be829bc · be829bc
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diff --git a/C++/Matrix/Matrix.cpp b/C++/Matrix/Matrix.cpp
@@ -0,0 +1,151 @@
+// Matrix.cpp : Defines the entry point for the console application.
+//
+
+//Given the following Matrix and Vector, what is the result:
+//
+//3 1 5      6   38
+//2 1 4  x   5 = 29
+//2 4 3      3   41 
+//
+
+
+#include "stdafx.h"
+#include <iostream>
+#include <math.h>
+#include <assert.h>
+using namespace std;
+
+#include <gtest\gtest.h>
+
+class Vector;
+// n Order Matrics
+class Matrix
+{
+public:
+    Matrix(int* p, int order)
+    {
+        m_order = order;
+        m_data = new int[order*order];
+        for(int row = 0; row < m_order; ++row)
+       {
+           for(int column = 0; column < m_order; ++column)
+           {
+               m_data[row*m_order + column] = *(p++);
+           }
+        }
+        cout << "Matrix is constructed!"<<endl;
+    }
+
+    ~Matrix()
+    {
+        delete[] m_data;
+    }
+
+    void Output()
+    {
+       cout << "Matrix content: " << endl;
+       for(int row = 0; row < m_order; ++row)
+       {
+           for(int column = 0; column < m_order; ++column)
+               cout << m_data[row*m_order + column] << " ";
+           cout << endl;
+       }
+    }
+
+    Vector * Multiply(const Vector & v);
+
+private:
+    int * m_data;
+    int m_order;
+};
+
+// n order Vector
+class Vector
+{
+public:
+    Vector(int * p, int length)
+    {
+        m_order = length;
+        m_data = new int[length];
+        for(int i = 0; i < length; i++)
+            m_data[i] = *(p++);
+        cout << "Vector is constructed" << endl;
+    } 
+
+    ~Vector()
+    {
+        delete[] m_data;
+    }
+
+    void Output()
+    {
+        cout << "Vector content: " << endl;
+        for(int i = 0; i < m_order; ++i)
+            cout << m_data[i] << endl;
+        cout << endl;
+    }
+
+    bool operator==(Vector & rhs)const
+    {
+        if(m_order != rhs.m_order)
+            return false;
+        for(int i = 0; i < m_order; i++)
+            if(m_data[i] != rhs.m_data[i])
+                return false;
+        return true;
+    }
+
+    friend Vector * Matrix::Multiply(const Vector &v);
+
+private:
+    int * m_data;
+    int m_order;
+};
+
+Vector * Matrix::Multiply(const Vector & v)
+{
+    assert(m_order == v.m_order);
+    if(m_order != v.m_order)
+        return NULL;
+
+    int * r = new int[m_order];
+    for(int i = 0; i < m_order; ++i)
+        r[i] = 0;
+    for(int row = 0; row < m_order; ++row)
+        for(int colum = 0; colum < m_order; ++colum)
+            r[row] += m_data[row * m_order + colum]*v.m_data[colum];
+
+    cout << "The result after Matrix multiplied Vector:" << endl;
+    for(int i = 0; i < m_order; ++i)
+        cout << r[i] << endl;
+
+    Vector * rv = new Vector(r, m_order);
+    return rv;
+}
+
+TEST(MatrixTest, InputOutput)
+{
+    int ma[] = {3,1,5,
+                2,1,4,
+                2,4,3};
+    Matrix m(ma, 3);
+    int va[] = {6, 5, 3};
+    Vector v(va, 3);
+    m.Output();
+    v.Output();
+    unique_ptr<Vector> r(m.Multiply(v));
+    r->Output();
+
+    int eva[] = {38, 29, 41}; 
+    Vector ev(eva, 3);
+    ASSERT_TRUE(ev == *r);
+
+    SUCCEED();
+}
+
+int _tmain(int argc, _TCHAR* argv[])
+{
+    testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}
+
diff --git a/C++/Matrix/Matrix.sln b/C++/Matrix/Matrix.sln
@@ -0,0 +1,20 @@
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diff --git a/C++/Matrix/Matrix.vcxproj b/C++/Matrix/Matrix.vcxproj
@@ -0,0 +1,95 @@
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diff --git a/C++/Matrix/Matrix.vcxproj.filters b/C++/Matrix/Matrix.vcxproj.filters
@@ -0,0 +1,36 @@
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diff --git a/C++/Matrix/ReadMe.txt b/C++/Matrix/ReadMe.txt
@@ -0,0 +1,40 @@
+========================================================================
+    CONSOLE APPLICATION : Matrix Project Overview
+========================================================================
+
+AppWizard has created this Matrix application for you.
+
+This file contains a summary of what you will find in each of the files that
+make up your Matrix application.
+
+
+Matrix.vcxproj
+    This is the main project file for VC++ projects generated using an Application Wizard.
+    It contains information about the version of Visual C++ that generated the file, and
+    information about the platforms, configurations, and project features selected with the
+    Application Wizard.
+
+Matrix.vcxproj.filters
+    This is the filters file for VC++ projects generated using an Application Wizard. 
+    It contains information about the association between the files in your project 
+    and the filters. This association is used in the IDE to show grouping of files with
+    similar extensions under a specific node (for e.g. ".cpp" files are associated with the
+    "Source Files" filter).
+
+Matrix.cpp
+    This is the main application source file.
+
+/////////////////////////////////////////////////////////////////////////////
+Other standard files:
+
+StdAfx.h, StdAfx.cpp
+    These files are used to build a precompiled header (PCH) file
+    named Matrix.pch and a precompiled types file named StdAfx.obj.
+
+/////////////////////////////////////////////////////////////////////////////
+Other notes:
+
+AppWizard uses "TODO:" comments to indicate parts of the source code you
+should add to or customize.
+
+/////////////////////////////////////////////////////////////////////////////
diff --git a/C++/Matrix/stdafx.cpp b/C++/Matrix/stdafx.cpp
@@ -0,0 +1,8 @@
+// stdafx.cpp : source file that includes just the standard includes
+// Matrix.pch will be the pre-compiled header
+// stdafx.obj will contain the pre-compiled type information
+
+#include "stdafx.h"
+
+// TODO: reference any additional headers you need in STDAFX.H
+// and not in this file
diff --git a/C++/Matrix/stdafx.h b/C++/Matrix/stdafx.h
@@ -0,0 +1,15 @@
+// stdafx.h : include file for standard system include files,
+// or project specific include files that are used frequently, but
+// are changed infrequently
+//
+
+#pragma once
+
+#include "targetver.h"
+
+#include <stdio.h>
+#include <tchar.h>
+
+
+
+// TODO: reference additional headers your program requires here
diff --git a/C++/Matrix/targetver.h b/C++/Matrix/targetver.h
@@ -0,0 +1,8 @@
+#pragma once
+
+// Including SDKDDKVer.h defines the highest available Windows platform.
+
+// If you wish to build your application for a previous Windows platform, include WinSDKVer.h and
+// set the _WIN32_WINNT macro to the platform you wish to support before including SDKDDKVer.h.
+
+#include <SDKDDKVer.h>