62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
// 编写一个名为 Matrix 的类，表示矩阵。重载乘法运算符 *，使其能够执行两个矩阵的乘法操作。
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#include <iostream>
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#include <cstring>
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#include <cstdlib>
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using namespace std;
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class Matrix
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{
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private:
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int row, col;
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int **matrix;
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public:
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Matrix(int row, int col) : row(row), col(col)
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{
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matrix = new int *[row];
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for (int i = 0; i < row; i++)
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matrix[i] = new int[col];
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}
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~Matrix()
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{
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for (int i = 0; i < row; i++)
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delete[] matrix[i];
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delete[] matrix;
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}
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public:
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Matrix operator*(const Matrix &m)
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{
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Matrix result(row, m.col);
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for (int i = 0; i < row; i++)
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for (int j = 0; j < m.col; j++)
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for (int k = 0; k < col; k++)
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result.matrix[i][j] += matrix[i][k] * m.matrix[k][j];
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return result;
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}
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friend ostream &operator<<(ostream &out, const Matrix &m)
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{
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for (int i = 0; i < m.row; i++)
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{
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for (int j = 0; j < m.col; j++)
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out << m.matrix[i][j] << " ";
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out << endl;
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}
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return out;
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}
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friend istream &operator>>(istream &in, Matrix &m)
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{
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for (int i = 0; i < m.row; i++)
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for (int j = 0; j < m.col; j++)
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in >> m.matrix[i][j];
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return in;
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}
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};
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int main()
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{
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} |