my_mat.h

来自「统计学习软件包」· C头文件 代码 · 共 41 行

#ifndef MY_MAT1_H
#define MY_MAT1_H

#include <iostream.h>


class My_Matrix {
    friend ostream &operator<<(ostream &, const My_Matrix &); 
    friend istream &operator>>(istream &, My_Matrix &);
    friend void mult(My_Matrix & , My_Matrix &, My_Matrix & ); 
    friend void transpose(My_Matrix &, My_Matrix &);


public:
   My_Matrix(int = 1, int = 1);                     
   ~My_Matrix();                                     
   double el(int r, int c) const { return ptr[r][c]; };
   double & el(int r, int c) { return ptr[r][c]; };

   void ReDimension(int, int);
   void Enlarge(int, int);
   int getSizeR() const;
   int getSizeC() const;
   int Nrows() const;
   int Ncols() const;

   double *operator[](int);
   const My_Matrix &operator=(const My_Matrix &);
  
private:
   
   double **ptr; 
   int sizeR;
   int sizeC;
};

#endif