【王道机试】-矩阵-矩阵乘法-哈尔滨工业大学

 

求矩阵乘法还挺有意思的

//#include "pch.h"
#include <iostream>
#include <vector>
using namespace std;
int main() {
	vector<vector<int>> num1(2, vector<int>(3));
	vector<vector<int>> num2(3, vector<int>(2));
	for (int i = 0; i < 2; i++)
		for (int j = 0; j < 3; j++)
			cin >> num1[i][j];


	for (int i = 0; i < 3; i++)
		for (int j = 0; j < 2; j++)
			cin >> num2[i][j];

	vector<vector<int>> res(2, vector<int>(2));

	for (int i = 0; i < 2; i++)//ik作为数组a//kj作为数组b//ij作为数组c
		for (int j = 0; j < 2; j++)
			for (int k = 0; k < 3; k++)
				res[i][j] += num1[i][k] * num2[k][j];

	for (int i = 0; i < 2; i++) {
		for (int j = 0; j < 2; j++) {
			cout << res[i][j] << " ";
		}
		cout << endl;
	}
}