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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main(void)
  6. {
  7. 	int n, m, k;
  8. 	int a[101][101], b[101][101], r[101][101] = { 0, };
  9.  
  10. 	//행렬 a입력
  11. 	cin >> n >> m;
  12. 	for (int i = 0; i < n; i++)
  13. 		for (int j = 0; j < m; j++)
  14. 			cin >> a[i][j];
  15.  
  16. 	//행렬 b입력
  17. 	cin >> m >> k;
  18. 	for (int i = 0; i < m; i++)
  19. 		for (int j = 0; j < k; j++)
  20. 			cin >> b[i][j];
  21.  
  22. 	//행렬의 곱 실행
  23. 	for (int i = 0; i < n; i++)
  24. 		for (int j = 0; j < k; j++)
  25. 			for (int u = 0; u < m; u++)
  26. 				r[i][j] += a[i][u] * b[u][j];
  27.  
  28. 	//출력
  29. 	for (int i = 0; i < n; i++)
  30. 	{
  31. 		for (int j = 0; j < k; j++)
  32. 			cout << r[i][j] << " ";
  33. 		cout << endl;
  34. 	}
  35. }
  36.  
Success #stdin #stdout 0s 5600KB
comments (?)
stdin
copy 
3 2
1 2
3 4
5 6
2 3
-1 -2 0
0 0 3
stdout
copy 
-1 -2 6 
-3 -6 12 
-5 -10 18
https://ideone.com/0tXsWH
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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