蓝桥杯基础练习VIP-矩阵乘法 （Java代码）

解题思路:

注意事项:最后错误率14% 。。。。。。我也不知道哪里有问题

参考代码:

package practice;

import java.util.Scanner;

public class Main_矩阵的乘法 {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int N = sc.nextInt();

int M = sc.nextInt();

int num[][] = new int[35][35];

for(int i = 1;i <= N; i++) {

for (int j = 1;j <= N; j++) {

num[i][j] = sc.nextInt();

}

}

int num1[][] = num;

for(int s = 1;s < M;s++) {

int num2[][] = new int[35][35];

for(int i = 1;i <= N; i++) {

for(int j = 1;j <= N; j++) {

num2[i][j] = ans(i,j,num1,num,N);

}

}

num1 = num2;

}

for(int i = 1;i <= N; i++) {

for(int j = 1;j <= N; j++) {

if(j != N)

System.out.print(num1[i][j] + " ");

else

System.out.print(num1[i][j]);

}

System.out.println();

}

}

private static int ans(int i, int j, int[][] num1, int[][] num, int n) {

int row = 1;

int sum = 0;

for(;row <= n;row++) {

sum += num1[i][row] * num[row][j];

}

return sum;

}

}