Init

Lab1_2a.cpp

@@ -0,0 +1,79 @@
+#include <iostream>
+using namespace std;
+void nhapMatran(int *arr, int r, int c)
+{
+	for (int i = 0; i < r; i++)
+	{
+		for (int j = 0; j < c; j++)
+		{
+			cout << "Nhap phan tu tai hang " << i + 1 << ", cot " << j + 1 << ":";
+			cin >> *(arr + r*i + j);
+		}
+	}
+}
+void hienthiMatran(int *arr, int r, int c)
+{
+	for (int i = 0; i < r; i++)
+	{
+		for (int j = 0; j < c; j++)
+		{
+			cout << *(arr + r * i + j) << "\t";
+		}
+		cout << endl;
+	}
+}
+void nhanMatran(int *a, int ar, int ac, int *b, int br, int bc, int *c)
+{
+	for (int i = 0; i < ar; i++)
+	{
+		for (int j = 0; j < bc; j++)
+		{
+			*(c + ar * i + j) = 0;
+		}
+	}
+	for (int i = 0; i < ar; i++)
+	{
+		for (int j = 0; j < bc; j++)
+		{
+			for (int k = 0; k < ac; k++)
+			{
+				*(c + ar * i + j) += (*(a + ar * i + k)) * (*(b + ac * k + j));
+			}
+		}
+	}
+}
+int main()
+{
+	const int ar = 3;
+	const int ac = 3;
+	const int br = 3;
+	const int bc = 3;
+	int a[ar][ac] =
+	{
+		{1, 2, 3},
+		{4, 5, 6},
+		{7, 8, 9}
+	};
+	int b[br][bc] =
+	{
+		{1, 2, 3},
+		{4, 5, 6},
+		{7, 8, 9}
+	};
+	int c[ar][bc];
+	/*
+	cout << "Nhap vao ma tran A[" << ar << "][" << ac << "]:" << endl;
+	nhapMatran(*a, ar, ac);
+	cout << "Nhap vao ma tran B[" << br << "][" << bc << "]:" << endl;
+	nhapMatran(*b, br, bc);
+	*/
+	cout << "Ma tran A:" << endl;
+	hienthiMatran(*a, ar, ac);
+	cout << "Ma tran B:" << endl;
+	hienthiMatran(*b, ar, ac);
+	cout << "Ma tran C = A*B:" << endl;
+	nhanMatran(*a, ar, ac, *b, br, bc, *c);
+	hienthiMatran(*c, ar, bc);
+	system("pause");
+	return 0;
+}