Create Matrix multiplication.cpp

added matrix multiplication in C++

C++/Matrix multiplication.cpp

@@ -0,0 +1,52 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+// mat1[R1][C1] and mat2[R2][C2]
+#define R1 2 // number of rows in Matrix-1
+#define C1 2 // number of columns in Matrix-1
+#define R2 2 // number of rows in Matrix-2
+#define C2 2 // number of columns in Matrix-2
+
+void mulMat(int mat1[][C1], int mat2[][C2])
+{
+    int rslt[R1][C2];
+
+    cout << "Multiplication of given two matrices is:\n";
+
+    for (int i = 0; i < R1; i++) {
+        for (int j = 0; j < C2; j++) {
+            rslt[i][j] = 0;
+
+            for (int k = 0; k < R2; k++) {
+                rslt[i][j] += mat1[i][k] * mat2[k][j];
+            }
+            cout << rslt[i][j] << "\t";
+        }
+        cout << endl;
+    }
+}
+
+// Driver code
+int main()
+{
+    int mat1[R1][C1] = { { 1, 3 },
+                         { 2, 4 } };
+
+    int mat2[R2][C2] = { { 1, 2 },
+                         { 3, 4 } };
+
+    if (C1 != R2) {
+        cout << "The number of columns in Matrix-1  must "
+                "be equal to the number of rows in "
+                "Matrix-2"
+             << endl;
+        cout << "Please update MACROs according to your "
+                "array dimension in #define section"
+             << endl;
+
+        exit(EXIT_FAILURE);
+    }
+      // Function call
+    mulMat(mat1, mat2);
+    return 0;
+}