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- Cij = (k=1,n)Σ Aik Bkj
- #include <iostream>
- #include <iomanip>
- #include <vector>
- using namespace std;
- vector<vector<int>> MatrixMultiplication(const vector<vector<int>>& A, const vector<vector<int>>& B)
- {
- vector<vector<int>> C(A.size());
- for (int i = 0; i < A.size(); ++i)
- {
- C[i].resize(A.size());
- for (int j = 0; j < A.size(); ++j)
- {
- C[i][j] = 0;
- for (int k = 0; k < A.size(); k++)
- {
- C[i][j] += A[i][k] * B[k][j];
- }
- }
- }
- return C;
- }
- int main()
- {
- vector<vector<int>> A = { {1,-2,1}, {2,0,-1}, {2,3,-1} };
- vector<vector<int>> B = { {2,1,-1}, {1,3, 1}, {-2,1,4} };
- vector<vector<int>> C = MatrixMultiplication(A, B);
- for (int i = 0; i < C.size(); ++i)
- {
- for (int j = 0; j < C[0].size(); ++j)
- {
- cout << setw(2) << C[i][j] << " ";
- }
- cout << endl;
- }
- return 0;
- }
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