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#include <iostream> int main() { int a[2][2] = { {2, 3}, {4, -1} }; int b[2][2] = { {1, 0}, {5, -2} }; int res[2][2] = { {0, 0}, {0, 0} }; //for (int i = 0; i < 2; i++) { // for (int j = 0; j < 2; j++) { // std::cin >> a[i][j]; // } //} //for (int i = 0; i < 2; i++) { // for (int j = 0; j < 2; j++) { // std::cin >> b[i][j]; // } //} for (int i = 0; i < 2; i++) { for (int j = 0; j < 2; j++) { for (int k = 0; k < 2; k++) { res[i][j] += a[i][k] * b[k][j]; } } } for (int i = 0; i < 2; i++) { for (int j = 0; j < 2; j++) { std::cout << res[i][j] << ' '; } } //std::cout << res[0][0] * res[1][1] - res[0][1] * res[1][0]; }
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