Question

有两个矩阵a和b，均为3行4列。求两个矩阵之和。重载运算符“+”，使之能用于矩阵相加。如c=a+b。

改造上述程序，使其能够表示任意行列的矩阵，并能执行c=a+b。用运算符重载写程序，我是新手不会写，请高手帮下忙

Answer 1

#include<iostream.h>
//using namespace std;
class matrix
{
public:
matrix(){};
matrix(int array[3][3])
{
for(int i = 0; i < 3; i++)
for(int j = 0; j < 3; j++)
a[i][j] = array[i][j];
}
friend matrix operator + (matrix &,matrix &);
friend istream & operator >> (istream &input, matrix &);
friend ostream & operator << (ostream &output, matrix &);
private:
int a[3][3];
};

matrix operator + (matrix & m1, matrix & m2)
{
int array[3][3];
for(int i = 0; i < 3; i++)
for(int j = 0; j < 3; j++)
array[i][j] = m1.a[i][j] + m2.a[i][j];
return matrix(array);
}

ostream & operator << (ostream & output, matrix & m)
{
for(int i = 0; i < 3; i++)
{
for(int j = 0; j < 3; j++)
output<<m.a[i][j];
}
return output;
}

istream & operator >> (istream & input, matrix & m)
{
for(int i = 0; i < 3; i++)
for(int j = 0; j < 3; j++)
input>>m.a[i][j];
return input;
}
void main()
{
matrix m, m1,m2;
cout<<"输入第一个数组:"<<endl;
cin>>m1;
cout<<"输入第二个数组:"<<endl;
cin>>m2;
m = m1 + m2;
cout<<"两数组相加后结果:"<<endl;
cout<<m;
}
看来c++的实验都差不多。我们的是3行3列。道理一样。看看过程修改数值就行。不过还是要自己想想做。我也是参考别人的再自己修改。加油~

Answer 2

MATLAB，直接输入矩阵不就能做吗？！不用编程吧

追问

我刚学重载，老师留的作业让编的，但我不会啊，帮帮忙