project3 uploadHEADmaster

1 files changed, 182 insertions, 0 deletions

diff --git a/project3/project3.cpp b/project3/project3.cpp
new file mode 100644
index 0000000..6c5ca59
--- /dev/null
+++ b/project3/project3.cpp
@@ -0,0 +1,182 @@
+// project3.cpp : This file contains the 'main' function. Program execution begins and ends there.
+//
+//Written by Jacob Knox: [email protected]
+
+#include <iostream>
+#include <string>
+#include <iomanip>
+#include "project3.h"
+
+using namespace std;
+
+int main()
+{
+    float m1[MATRIX_SIZE][MATRIX_SIZE], m2[MATRIX_SIZE][MATRIX_SIZE];
+    int choice = 0;
+
+    //make sure you have matricies before giving options
+    getMatricies(m1, m2);
+    menu(choice, m1, m2);
+}
+
+void menu(int choice, float m1[MATRIX_SIZE][MATRIX_SIZE], float m2[MATRIX_SIZE][MATRIX_SIZE])
+{
+    string menu = "\t\t--Matirx Prorgam--\n\
+1. Input new matricies\n\
+2. Multiply matricies\n\
+3. Add matricies\n\
+4. Exit Program\n\n\
+Input your choice: ";
+
+    //choice == 4 means quit and retturn to main
+    //main program loop
+    while (choice != 4)
+    {
+        choice = readInt(menu, "Error please input an integer 1-4.\n");
+
+        switch (choice)
+        {
+        case 1:
+            getMatricies(m1, m2);
+            break;
+        case 2:
+            multiplyMatrix(m1, m2);
+            break;
+        case 3:
+            addMatrix(m1, m2);
+            break;
+        case 4:
+            cout << "Exiting program...";
+            break;
+        default:
+            cout << "Error unknown choice " << choice << ". Please try again.";
+            break;
+        }
+    }
+}
+
+//reads two matricies from user
+void getMatricies(float m1[MATRIX_SIZE][MATRIX_SIZE], float m2[MATRIX_SIZE][MATRIX_SIZE])
+{
+    cout << "Input the values for the first matrix:\n";
+    getMatrix(m1);
+
+    cout << "Input the values for the second matrix:\n";
+    getMatrix(m2);
+}
+
+// reads all the values for a single matrix 
+void getMatrix(float mat[MATRIX_SIZE][MATRIX_SIZE])
+{ 
+    for (int x = 0; x < MATRIX_SIZE; x++)
+    {
+        for (int y = 0; y < MATRIX_SIZE; y++)
+        {
+            mat[x][y] = readFloat("Input the matrix value at " + to_string(x+1) + ", " + to_string(y+1) + ": ", "Error invalid value. Please input a float.\n");
+        }
+    }
+}
+
+// adds matrix 1 and 2 and shows result
+void addMatrix(float m1[MATRIX_SIZE][MATRIX_SIZE], float m2[MATRIX_SIZE][MATRIX_SIZE])
+{
+    float result[MATRIX_SIZE][MATRIX_SIZE];
+    
+    for (int x = 0; x < MATRIX_SIZE; x++)
+    {
+        for (int y = 0; y < MATRIX_SIZE; y++)
+        {
+            //adding matrix is adding each spot to corresponding spot in result
+            result[x][y] = m1[x][y] + m2[x][y];
+        }
+    }
+
+    cout << "The result of adding\n";
+    printMatrix(m1);
+    cout << "with\n";
+    printMatrix(m2);
+    cout << "is:\n";
+    printMatrix(result);
+}
+
+//multiplies thw two matrices 
+void multiplyMatrix(float m1[MATRIX_SIZE][MATRIX_SIZE], float m2[MATRIX_SIZE][MATRIX_SIZE])
+{
+    float result[MATRIX_SIZE][MATRIX_SIZE];
+
+    for (int x = 0; x < MATRIX_SIZE; x++)
+    {
+        for (int y = 0; y < MATRIX_SIZE; y++)
+        {
+            //result for a specific spot is the dot product of that spot in the two matrices
+            result[x][y] = calulateDotProduct(x, y, m1, m2);
+        }
+    }
+
+    cout << "The result of multiplying\n";
+    printMatrix(m1);
+    cout << "with\n";
+    printMatrix(m2);
+    cout << "is:\n";
+    printMatrix(result);
+}
+
+//dot product is multiplying the corresponding values in one matrix collunm/ row and adding the results of that
+float calulateDotProduct(int x, int y, float m1[MATRIX_SIZE][MATRIX_SIZE], float m2[MATRIX_SIZE][MATRIX_SIZE])
+{
+    float product = 0;
+
+    for (int i = 0; i < MATRIX_SIZE; i++)
+    {
+        product += m1[x][i]*m2[i][y];
+    }
+    return product;
+}
+
+//reads an int from the user, will output error if it fails and repeat asking until it gets a good answer
+int readInt(const std::string& question, const std::string& error)
+{
+    int value;
+
+    cout << question;
+    while (!(cin >> value))
+    {
+        cin.clear();
+        while (cin.get() != '\n') continue;
+        cout << error;
+        cout << question;
+    }
+
+    return value;
+}
+
+//reads an float from the user, will output error if it fails and repeat asking until it gets a good answer
+float readFloat(const std::string& question, const std::string& error)
+{
+    float value;
+
+    cout << question;
+    while (!(cin >> value))
+    {
+        cin.clear();
+        while (cin.get() != '\n') continue;
+        cout << error;
+        cout << question;
+    }
+
+    return value;
+}
+
+//prints a matrix by looping over it and formatting appropiately
+void printMatrix(float mat[MATRIX_SIZE][MATRIX_SIZE])
+{
+    for (int x = 0; x < MATRIX_SIZE; x++)
+    {
+        for (int y = 0; y < MATRIX_SIZE; y++)
+        {
+            cout << setprecision(3) << fixed << "[" << mat[x][y] << "]";
+        }
+
+        cout << endl;
+    }
+}
\ No newline at end of file