求三个矩阵相乘C++代码

[VRkey]

RT 求帮助！！求三个矩阵相乘C++代码

[赵4老师]

Matrix Matrix Description The templated class matrix<T, F, A> is the base container adaptor for dense matrices. For a (m x n)-dimensional matrix and 0 <= i < m, 0 <= j < n every element mi, j is mapped to the (i x n + j)-th element of the container for row major orientation or the (i + j x m)-th element of the container for column major orientation. Example #include <boost/numeric/ublas/matrix.hpp> #include <boost/numeric/ublas/io.hpp> int main () { using namespace boost::numeric::ublas; matrix<double> m (3, 3); for (unsigned i = 0; i < m.size1 (); ++ i) for (unsigned j = 0; j < m.size2 (); ++ j) m (i, j) = 3 * i + j; std::cout << m << std::endl; } Definition Defined in the header matrix.hpp. Template parameters Parameter Description Default T The type of object stored in the matrix. F Functor describing the storage organization. [1] row_major A The type of the Storage array. [2] unbounded_array<T> Model of Matrix . Type requirements None, except for those imposed by the requirements of Matrix . Public base classes matrix_container<matrix<T, F, A> > Members Member Description matrix () Allocates an uninitialized matrix that holds zero rows of zero elements. matrix (size_type size1, size_type size2) Allocates an uninitialized matrix that holds size1 rows of size2 elements. matrix (const matrix &m) The copy constructor. template<class AE> matrix (const matrix_expression<AE> &ae) The extended copy constructor. void resize (size_type size1, size_type size2, bool preserve = true) Reallocates a matrix to hold size1 rows of size2 elements. The existing elements of the matrix are preseved when specified. size_type size1 () const Returns the number of rows. size_type size2 () const Returns the number of columns. const array_type& data () const array_type& data () const_reference operator () (size_type i, size_type j) const Returns a const reference of the j -th element in the i-th row. reference operator () (size_type i, size_type j) Returns a reference of the j-th element in the i-th row. matrix &operator = (const matrix &m) The assignment operator. matrix &assign_temporary (matrix &m) Assigns a temporary. May change the matrix m. template<class AE> matrix &operator = (const matrix_expression<AE> &ae) The extended assignment operator. template<class AE> matrix &assign (const matrix_expression<AE> &ae) Assigns a matrix expression to the matrix. Left and right hand side of the assignment should be independent. template<class AE> matrix &operator += (const matrix_expression<AE> &ae) A computed assignment operator. Adds the matrix expression to the matrix. template<class AE> matrix &plus_assign (const matrix_expression<AE> &ae) Adds a matrix expression to the matrix. Left and right hand side of the assignment should be independent. template<class AE> matrix &operator -= (const matrix_expression<AE> &ae) A computed assignment operator. Subtracts the matrix expression from the matrix. template<class AE> matrix &minus_assign (const matrix_expression<AE> &ae) Subtracts a matrix expression from the matrix. Left and right hand side of the assignment should be independent. template<class AT> matrix &operator *= (const AT &at) A computed assignment operator. Multiplies the matrix with a scalar. template<class AT> matrix &operator /= (const AT &at) A computed assignment operator. Divides the matrix through a scalar. void swap (matrix &m) Swaps the contents of the matrices. void insert_element (size_type i, size_type j, const_reference t) Inserts the value t at the j-th element of the i-th row. void erase_element (size_type i, size_type j) Erases the value at the j-th element of the i-th row. void clear () Clears the matrix. const_iterator1 begin1 () const Returns a const_iterator1 pointing to the beginning of the matrix. const_iterator1 end1 () const Returns a const_iterator1 pointing to the end of the matrix. iterator1 begin1 () Returns a iterator1 pointing to the beginning of the matrix. iterator1 end1 () Returns a iterator1 pointing to the end of the matrix. const_iterator2 begin2 () const Returns a const_iterator2 pointing to the beginning of the matrix. const_iterator2 end2 () const Returns a const_iterator2 pointing to the end of the matrix. iterator2 begin2 () Returns a iterator2 pointing to the beginning of the matrix. iterator2 end2 () Returns a iterator2 pointing to the end of the matrix. const_reverse_iterator1 rbegin1 () const Returns a const_reverse_iterator1 pointing to the beginning of the reversed matrix. const_reverse_iterator1 rend1 () const Returns a const_reverse_iterator1 pointing to the end of the reversed matrix. reverse_iterator1 rbegin1 () Returns a reverse_iterator1 pointing to the beginning of the reversed matrix. reverse_iterator1 rend1 () Returns a reverse_iterator1 pointing to the end of the reversed matrix. const_reverse_iterator2 rbegin2 () const Returns a const_reverse_iterator2 pointing to the beginning of the reversed matrix. const_reverse_iterator2 rend2 () const Returns a const_reverse_iterator2 pointing to the end of the reversed matrix. reverse_iterator2 rbegin2 () Returns a reverse_iterator2 pointing to the beginning of the reversed matrix. reverse_iterator2 rend2 () Returns a reverse_iterator2 pointing to the end of the reversed matrix.

[赵4老师]

Notes [1] Supported parameters for the storage organization are row_major and column_major. [2] Common parameters for the storage array are unbounded_array<T> , bounded_array<T> and std::vector<T> . Identity Matrix Description The templated class identity_matrix<T, ALLOC> represents identity matrices. For a (m x n)-dimensional identity matrix and 0 <= i < m, 0 <= j < n holds idi, j = 0, if i <> j, and idi, i= 1. Example #include <boost/numeric/ublas/matrix.hpp> #include <boost/numeric/ublas/io.hpp> int main () { using namespace boost::numeric::ublas; identity_matrix<double> m (3); std::cout << m << std::endl; } Definition Defined in the header matrix.hpp. Template parameters Parameter Description Default T The type of object stored in the matrix. int ALLOC An STL Allocator for size_type and difference_type. std::allocator Model of Matrix . Type requirements None, except for those imposed by the requirements of Matrix . Public base classes matrix_container<identity_matrix<T> > Members Member Description identity_matrix () Constructs an identity_matrix that holds zero rows of zero elements. identity_matrix (size_type size) Constructs an identity_matrix that holds size rows of size elements. identity_matrix (const identity_matrix &m) The copy constructor. void resize (size_type size, bool preserve = true) Resizes a identity_matrix to hold size rows of size elements. Therefore the existing elements of the itendity_matrix are always preseved. size_type size1 () const Returns the number of rows. size_type size2 () const Returns the number of columns. const_reference operator () (size_type i, size_type j) const Returns the value of the j-th element in the i-th row. identity_matrix &operator = (const identity_matrix &m) The assignment operator. identity_matrix &assign_temporary (identity_matrix &m) Assigns a temporary. May change the identity matrix m . void swap (identity_matrix &m) Swaps the contents of the identity matrices. const_iterator1 begin1 () const Returns a const_iterator1 pointing to the beginning of the identity_matrix. const_iterator1 end1 () const Returns a const_iterator1 pointing to the end of the identity_matrix. const_iterator2 begin2 () const Returns a const_iterator2 pointing to the beginning of the identity_matrix. const_iterator2 end2 () const Returns a const_iterator2 pointing to the end of the identity_matrix. const_reverse_iterator1 rbegin1 () const Returns a const_reverse_iterator1 pointing to the beginning of the reversed identity_matrix. const_reverse_iterator1 rend1 () const Returns a const_reverse_iterator1 pointing to the end of the reversed identity_matrix. const_reverse_iterator2 rbegin2 () const Returns a const_reverse_iterator2 pointing to the beginning of the reversed identity_matrix. const_reverse_iterator2 rend2 () const Returns a const_reverse_iterator2 pointing to the end of the reversed identity_matrix. Zero Matrix Description The templated class zero_matrix<T, ALLOC> represents zero matrices. For a (m x n)-dimensional zero matrix and 0 <= i < m, 0 <= j < n holds zi, j = 0. Example #include <boost/numeric/ublas/matrix.hpp> #include <boost/numeric/ublas/io.hpp> int main () { using namespace boost::numeric::ublas; zero_matrix<double> m (3, 3); std::cout << m << std::endl; } Definition Defined in the header matrix.hpp. Template parameters Parameter Description Default T The type of object stored in the matrix. int ALLOC An STL Allocator for size_type and difference_type. std::allocator Model of Matrix . Type requirements None, except for those imposed by the requirements of Matrix . Public base classes matrix_container<zero_matrix<T> > Members Member Description zero_matrix () Constructs a zero_matrix that holds zero rows of zero elements. zero_matrix (size_type size1, size_type size2) Constructs a zero_matrix that holds size1 rows of size2 elements. zero_matrix (const zero_matrix &m) The copy constructor. void resize (size_type size1, size_type size2, bool preserve = true) Resizes a zero_matrix to hold size1 rows of size2 elements. Therefore the existing elements of the zero_matrix are always preseved. size_type size1 () const Returns the number of rows. size_type size2 () const Returns the number of columns. const_reference operator () (size_type i, size_type j) const Returns the value of the j-th element in the i-th row. zero_matrix &operator = (const zero_matrix &m) The assignment operator. zero_matrix &assign_temporary (zero_matrix &m) Assigns a temporary. May change the zero matrix m . void swap (zero_matrix &m) Swaps the contents of the zero matrices. const_iterator1 begin1 () const Returns a const_iterator1 pointing to the beginning of the zero_matrix. const_iterator1 end1 () const Returns a const_iterator1 pointing to the end of the zero_matrix. const_iterator2 begin2 () const Returns a const_iterator2 pointing to the beginning of the zero_matrix. const_iterator2 end2 () const Returns a const_iterator2 pointing to the end of the zero_matrix. const_reverse_iterator1 rbegin1 () const Returns a const_reverse_iterator1 pointing to the beginning of the reversed zero_matrix. const_reverse_iterator1 rend1 () const Returns a const_reverse_iterator1 pointing to the end of the reversed zero_matrix. const_reverse_iterator2 rbegin2 () const Returns a const_reverse_iterator2 pointing to the beginning of the reversed zero_matrix. const_reverse_iterator2 rend2 () const Returns a const_reverse_iterator2 pointing to the end of the reversed zero_matrix. Scalar Matrix Description The templated class scalar_matrix<T, ALLOC> represents scalar matrices. For a (m x n)-dimensional scalar matrix and 0 <= i < m, 0 <= j < n holds zi, j = s. Example #include <boost/numeric/ublas/matrix.hpp> #include <boost/numeric/ublas/io.hpp> int main () { using namespace boost::numeric::ublas; scalar_matrix<double> m (3, 3); std::cout << m << std::endl; } Definition Defined in the header matrix.hpp. Template parameters Parameter Description Default T The type of object stored in the matrix. int ALLOC An STL Allocator for size_type and difference_type. std::allocator Model of Matrix . Type requirements None, except for those imposed by the requirements of Matrix . Public base classes matrix_container<scalar_matrix<T> > Members Member Description scalar_matrix () Constructs a scalar_matrix that holds scalar rows of zero elements. scalar_matrix (size_type size1, size_type size2, const value_type &value) Constructs a scalar_matrix that holds size1 rows of size2 elements each of the specified value. scalar_matrix (const scalar_matrix &m) The copy constructor. void resize (size_type size1, size_type size2, bool preserve = true) Resizes a scalar_matrix to hold size1 rows of size2 elements. Therefore the existing elements of the scalar_matrix are always preseved. size_type size1 () const Returns the number of rows. size_type size2 () const Returns the number of columns. const_reference operator () (size_type i, size_type j) const Returns the value of the j-th element in the i-th row. scalar_matrix &operator = (const scalar_matrix &m) The assignment operator. scalar_matrix &assign_temporary (scalar_matrix &m) Assigns a temporary. May change the scalar matrix m . void swap (scalar_matrix &m) Swaps the contents of the scalar matrices. const_iterator1 begin1 () const Returns a const_iterator1 pointing to the beginning of the scalar_matrix. const_iterator1 end1 () const Returns a const_iterator1 pointing to the end of the scalar_matrix. const_iterator2 begin2 () const Returns a const_iterator2 pointing to the beginning of the scalar_matrix. const_iterator2 end2 () const Returns a const_iterator2 pointing to the end of the scalar_matrix. const_reverse_iterator1 rbegin1 () const Returns a const_reverse_iterator1 pointing to the beginning of the reversed scalar_matrix. const_reverse_iterator1 rend1 () const Returns a const_reverse_iterator1 pointing to the end of the reversed scalar_matrix. const_reverse_iterator2 rbegin2 () const Returns a const_reverse_iterator2 pointing to the beginning of the reversed scalar_matrix. const_reverse_iterator2 rend2 () const Returns a const_reverse_iterator2 pointing to the end of the reversed scalar_matrix. -------------------------------------------------------------------------------- Copyright (?) 2000-2002 Joerg Walter, Mathias Koch Use, modification and distribution are subject to the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt ).

[VRkey]

垃圾代码。。。。