题目
编写程序，有两个均为3行3列的矩阵ml和m2，求两个矩阵之和。重载运算符“＋”、“>>”和“<<”，使之能用于矩阵相加、输入和输出
#include <iostream>
using namespace std;
class c_arry
{
public:
int a[3][3];
friend istream& operator >> (istream& in, c_arry& p); //重载运算符">>"
friend ostream& operator << (ostream& out, c_arry& p); //重载运算符"<<"
friend c_arry operator+( const c_arry& b, const c_arry& c); //重载运算符"+"
void print();
};
c_arry x;
istream& operator >> (istream& in, c_arry& p)
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
cout << "第 " << i << j << " 个元素值";
in >> p.a[i][j];
}
cout << endl;
}
return in;
}
ostream& operator << (ostream& out, c_arry& p)
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
out<< p.a[i][j];
}
cout << endl;
}
return out;
}
c_arry operator+( const c_arry& b ,const c_arry& c)
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
x.a[i][j]+= b.a[i][j] + c.a[i][j];
}
}
return c_arry(x);
}
void c_arry:: print()
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
cout << a[i][j]<<" ";
}
cout << endl;
}
}
int main()
{
c_arry b, c;
cin >> b;
cout << "请输入第二个数组：" << endl;
cin >> c;
x = b + c;
cout << "b+c= "<<endl;
x.print();
}