矩阵运算

#include <iostream>
using namespace std;
struct Matric {
    int row, low;
    int matric[100][100];
    Matric(int x, int y) :row(x), low(y) {}
};
//矩阵相加
void add(Matric x, Matric y)
{
    Matric a = Matric(x.row, y.row);
    for(int i=0;i<100;i++)//初始化矩阵
        for (int j = 0; j < 100; j++)
        {
            a.matric[i][j] = 0;
        }
    //相加操作
    for (int i = 0; i < a.row; i++)
        for (int j = 0; j < a.row; j++)
        {
            a.matric[i][j] = x.matric[i][j] + y.matric[i][j];
        }
    //输出
    for (int i = 0; i < a.row; i++) {

        for (int j = 0; j < a.row; j++)
        {
            if (j == 0) { cout << a.matric[i][j]; }
            else {
                cout << " " << a.matric[i][j];
            }
        }
        cout << endl;
    }
}

void muti(Matric x, Matric y)
{
    Matric a = Matric(x.row, y.row);
    for (int i = 0; i < 100; i++)//初始化矩阵
        for (int j = 0; j < 100; j++)
        {
            a.matric[i][j] = 0;
        }
    //相乘
    for(int i=0;i<a.row;i++)
        for(int j=0;j<a.low;j++)
            for(int k=0;k<a.low;k++) 
            {
                a.matric[i][j] += x.matric[i][k] * y.matric[k][j];
            }
    //输出
    for (int i = 0; i < a.row; i++) {

        for (int j = 0; j < a.row; j++)
        {
            if (j == 0) { cout << a.matric[i][j]; }
            else {
                cout << " " << a.matric[i][j];
            }
        }
        cout << endl;
    }
}

int main()
{
    Matric x = Matric(4, 4);
    Matric y = Matric(4, 4);
    for(int i=0;i<4;i++)
        for (int j = 0; j < 4; j++) {
            cin >> x.matric[i][j];
        }
    for (int i = 0; i < 4; i++)
        for (int j = 0; j < 4; j++) {
            cin >> y.matric[i][j];
        }
    add(x, y);
    muti(x, y);
}