c++通过运算符重载，实现矩阵类简单输出、相加、赋值

int main()
{
	vector> arraya = {{1,3,4,5},{5,6,7,3},{8,6,8,4}};
	Matrix a(3, 4);
	
	a = arraya;                //二维vector赋值给矩阵
	cout << a << endl;
	
	vector> arrayb = {{6,3,3,5},{5,2,1,3},{6,6,8,7}};
	Matrix b(3, 4);

	b = arrayb;
	cout << b << endl;
	
	b = b + a;
	cout << b << endl;
	
	return 0;
}

输出结果

矩阵类的定义

class Matrix{
	friend ostream& operator << (ostream &out, Matrix &b);     //声明<<运算符重载友元
public:

	Matrix(int a, int b): row(a), column(b){      //构造函数，传入矩阵行和类，并调用load初始化
		load();
	};
	
	Matrix operator +(Matrix &b);                 //+运算符重载函数

	Matrix &operator = (vector> array);    //=运算符重载函数

private:

	void load()                    //初始化数据。生成对应行列元素都是0的矩阵
	{
		p = new double*[row];                        //让p指向 储存double指针的数组
		for(int i = 0; i 
 
 
+运算符重载 实现
 
Matrix Matrix::operator +(Matrix &b) 
{
	Matrix temp = *this;
	for(int i=0; ip[i][t] + b.p[i][t];
		}
	return temp;
}
 
 
=运算符重载实现，利用传入的vector>赋值
 
Matrix &Matrix::operator = (vector> array)
{
	for(int i=0; i 
 
 <<运算符重载实现
 
ostream类的拷贝构造函数和赋值函数是保护类型的，所以ostream不允许拷贝或者赋值，我们需要用两个引用来传入传出
 
ostream& operator << (ostream &out, Matrix &b)
{
	for(int i =0; i