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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		Scanner in = new Scanner(System.in);
  10. 		double mu=0;
  11.     	int n=in.nextInt();
  12.     	double[][] x = new double[n][n];
  13.     	double[][] y = new double[n][n];
  14.     	double[][] z = new double[n][n];
  15.     	for (int i = 0; i < n; i++){
  16.     		for (int j = 0; j < n; j++){
  17.     			x[i][j]=in.nextDouble();;
  18.     			y[j][i]=x[i][j];
  19.     		}
  20.     	}
  21.     	for (int i = 0; i < n; i++){
  22.     		for (int j = 0; j < n; j++){
  23.     			for (int p = 0; p < n; p++){	
  24.     				mu += x[i][p]*y[p][j];
  25.     			}
  26.     			z[i][j] = mu;
  27.     			mu = 0;
  28.     		}
  29.     	}
  30.     	for (int i = 0; i < n; i++){
  31.     		for (int j = 0; j < n; j++){
  32.     			System.out.printf("%.1f ",z[i][j]);
  33.     		}
  34.     		System.out.println();
  35.     	}
  36. 	}
  37. }
Success #stdin #stdout 0.16s 321344KB
comments (?)
stdin
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4
1.2 2 3 4
5 6 7 8
9 0 1 2
3 4 5 6
stdout
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30.4 71.0 21.8 50.6 
71.0 174.0 68.0 122.0 
21.8 68.0 86.0 44.0 
50.6 122.0 44.0 86.0
https://ideone.com/u96MDY
Матрица в квадрате
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
secret

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