Added matrix multiplication

main.cpp

@@ -6,16 +6,16 @@ int main()
 {
     srand(time(0));
 
-    Matrix a(3,3);
-    Matrix b(3,3);
+    Matrix a(2,1);
+    Matrix b(1,2);
 
     a.Randomize();
     b.Randomize();
 
     a.Print("A");
     b.Print("B");
-    a.Add(&b);
-    a.Print("A+B");
+
+    a.Multiply(&b).Print("A x B");
 
     return 0;
 }

matrices.h

@@ -14,6 +14,7 @@ class Matrix{
         void Set(float);
 
         void Multiply(float);
+        Matrix Multiply(Matrix*);
 
         void Add(float);
         void Add(Matrix*);
@@ -27,6 +28,7 @@ class Matrix{
 
         // Constructors
         Matrix(int, int);
+        Matrix(Matrix*);
 };
 
 // Constructs a zero matrix
@@ -40,6 +42,27 @@ Matrix::Matrix(int rows, int cols){
     }
 }
 
+Matrix::Matrix(Matrix* other){
+    this->values = other->values;
+}
+
+// Multiply 2 matrices (AxB = this x other)
+Matrix Matrix::Multiply(Matrix* other){
+    // Resulting size is this->M x other->N
+    Matrix result(this->values.size(), other->values[0].size());
+    for(int m = 0; m < result.values.size(); m++){
+        for(int n = 0; n < result.values[m].size(); n++){
+            // Sum multiplications
+            float buffer = 0.0F;
+            for(int i = 0; i < this->values[0].size(); i++){
+                buffer += this->values[m][i] * other->values[i][n];
+            }
+            result.values[m][n] = buffer;
+        }
+    }
+    return result;
+}
+
 // Add 2 matrices
 void Matrix::Add(Matrix* other){
     // Matrices need to be the same size
@@ -118,11 +141,11 @@ void Matrix::Transpose(){
 
     // Invert matrix size
     for(int m = 0; m < buffer[0].size(); m++){
-        std::vector<float> line = {};
+        std::vector<float> row = {};
         for(int n = 0; n < buffer.size(); n++){
-            line.push_back(buffer[n][m]);
+            row.push_back(buffer[n][m]);
         }
-        this->values.push_back(line);
+        this->values.push_back(row);
     }
 }