NNFS p.135

Started on the iteration, not need to rewrite matadd.h and need to make matrandom.h.

include/numerics/matscalar.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "./utils/matrix.h"
+
+namespace numerics{
+	
+	template <typename T>
+	void inplace_matscalar(utils::Matrix<T>& A, const T scalar){
+
+		const uint64_t rows = A.rows();
+		const uint64_t cols = A.cols();
+
+		for (uint64_t i = 0; i < rows; ++i){
+			for (uint64_t j = 0; j < cols; ++j){
+				A(i,j) *= scalar;
+			}
+		}
+	}
+
+	template <typename T>
+	utils::Matrix<T> matscalar(const utils::Matrix<T>& A, T scalar){
+
+		utils::Matrix<T> B = A;
+		inplace_matscalar(B, scalar);
+		return B;
+
+	}
+
+
+
+} // namespace numerics
+