cs11_c++_lab2

Matrix.hh

class Matrix
{
    int row;
    int col;
    int *p;
public:

    Matrix();
    Matrix(int x,int y);
    ~Matrix();

    Matrix(Matrix &m);

    int getrows();
    int getcols();

    void setelem(int x,int y,int elem);

    int getelem(int x,int y);

    void add(Matrix &m);

    void subtract(Matrix &m);    

    bool equals(Matrix &m);
};

Matrix.cpp

#include "Matrix.hh"
#include <cassert>
#include <iostream>

using namespace std;

Matrix::Matrix()
{
    row=0;
    col=0;
    p=0;
}

Matrix::Matrix(int x,int y)
{
    assert(x>=0);
    assert(y>=0);
    row=x;
    col=y;
    p=new int[row*col];
    for(int i=0;i<row*col;i++)
        p[i]=0;
}

Matrix::Matrix(Matrix &m)
{
    row=m.row;
    col=m.col;
    p=new int[row*col];
    for(int i=0;i<row*col;i++)
    p[i]=m.p[i];
}

Matrix::~Matrix()
{
    delete[] p;
}

int Matrix::getrows()
{
    return row;
}

int Matrix::getcols()
{
    return col;
}

int Matrix::getelem(int x,int y)
{
    assert(x>=0);
    assert(y>=0);
    return p[x*col+y];
}

void Matrix::setelem(int x,int y,int elem)
{
    assert(x>=0);
    assert(y>=0);
    p[x*col+y]=elem;
}

void Matrix::add(Matrix &m)
{
    assert(    (row==m.row) || (col==m.col) );
    for(int i=0;i<row*col;i++)
    p[i]+=m.p[i];
}

void Matrix::subtract(Matrix &m)
{
    assert( (row==m.row) || (col==m.col) );
    for(int i=0;i<row*col;i++)
    p[i]-=m.p[i];
}

bool Matrix::equals(Matrix &m)
{
    bool b=true;
    if( (row!=m.row) || (col!=m.col) )return false;
    for(int i=0;i<row*col;i++)
        if(p[i]!=m.p[i])
        {    b=false;return b;}
    return b;
}