diff --git a/Matrix/main.cpp b/Matrix/main.cpp
index 5d7a01f..a8d45de 100644
--- a/Matrix/main.cpp
+++ b/Matrix/main.cpp
@@ -31,6 +31,44 @@ int main() {
 	int out[] = { 1,2,3,4 };
 	matrix<int> tmp(2, 2, out);
 	tmp = left * right;
-	cout << "times: " << endl << tmp << endl;
+	cout << "times: " << endl << tmp << endl << endl;
+
+	//还是有地方浅拷贝了，调试过程中最好加上引用
+	//大概率是拷贝构造函数的问题，如果直接输出非引用，会创建新的对象，这个对象会出问题，比如double delete之类
+	cout << "transpose: " << endl << tmp.transpose() << endl;
+	cout << "transpose left: " << endl << left.transpose() << endl;
+	cout << "transpose right: " << endl << right.transpose() << endl;
 	return 0;
-}
\ No newline at end of file
+}
+
+/*
+left:
+1 2 3
+4 5 6
+
+right:
+1 2
+3 4
+5 6
+
+left(1, 1): 1
+right(2, 1): 3
+
+times:
+22 28
+49 64
+
+
+transpose:
+22 49
+28 64
+
+transpose left:
+1 4
+2 5
+3 6
+
+transpose right:
+1 3 5
+2 4 6
+*/
\ No newline at end of file
diff --git a/Matrix/matrix.h b/Matrix/matrix.h
index 8012e89..c11271c 100644
--- a/Matrix/matrix.h
+++ b/Matrix/matrix.h
@@ -22,6 +22,7 @@ public:
 	matrix<T> operator-(const matrix<T>& x) const;
 	matrix<T> operator*(const matrix<T>& x) const;
 	matrix<T>& operator+=(const matrix<T>& x);
+	matrix<T>& transpose();
 	template <class T>
 	friend std::ostream& operator<<(std::ostream& os, const matrix<T>& x);
 
@@ -53,12 +54,16 @@ matrix<T>::matrix(int rows, int cols, T* x) : rows(rows), cols(cols){
 	if (rows < 0 || cols < 0) {
 		throw std::out_of_range("Matrix subscript out of range");
 	}
-
+	
 	int sum = rows * cols;
 	element = new T[sum];
-	for (int i = 0; i < sum; i++) {
-		element[i] = x[i];
+	if (x) {
+		for (int i = 0; i < sum; i++) element[i] = x[i];
 	}
+	else {
+		for (int i = 0; i < sum; i++) element[i] = T();
+	}
+	
 }
 
 template <class T>
@@ -146,3 +151,18 @@ std::ostream& operator<<(std::ostream& os, const matrix<T>& x) {
 	}
 	return os;
 }
+
+template <class T>
+matrix<T>& matrix<T>::transpose() {
+	T* telement = new T[rows * cols];
+	for (int i = 1; i <= rows; i++) {
+		for (int j = 1; j <= cols; j++) {
+			telement[(j - 1) * rows + i - 1] = (*this)(i, j);
+		}
+	}
+
+	delete[] element;
+	std::swap(rows, cols);
+	element = telement;
+	return *this;
+}