C++源码：动态数组实例（1维） / 四六文摘

\\ C++源码：动态数组实例（1维）useage: Example for dyn ARRAY Class (1D)
*******************/

// ARRAY
#include <iostream>
using namespace std;

const int defau_m=9,defau_n=9;
class IntArray
   {
    protected:     //
     int size,m,n; //Array size,
int *pia;
    public:

     IntArray (int mm=defau_m,int nn=defau_n);//Constructor1 构造函数1
     IntArray (const IntArray& );             //Constructor2 构造函数(COPY CONSTRUCTOR)
     ~IntArray ();                                    //析构函数
     IntArray & operator= (const IntArray &);    //=use &:   实现左值
     IntArray   operator+ (const IntArray &);
     IntArray   operator- (const IntArray &);
     IntArray   operator* (const IntArray &);
//   int& operator[] (int,int);
     int getsize () {return size;}
     void assign (int value,int index1,int index2);
     void chang_s(int mm,int nn);
     void show1 (int index1,int index2);
     void show ();

   };

IntArray::IntArray(int mm,int nn)   // constuctor 1
    {
     m=mm; n=nn;
     size=m*n;
     pia=new int[size];
for (int i=0;i<size;i++)
     pia[i]=0;
    }

IntArray::IntArray(const IntArray &PA) // constuctor 2 (COPY constructor)
    {
     m=PA.m; n=PA.n;
     size=m*n;
     // delete pia;
     pia=new (int[size]);
for (int i=0;i<(size);i++)
     pia[i]=PA.pia[i];
    }

IntArray& IntArray::operator=(const IntArray &PA)
    {
     delete pia;
     m=PA.m; n=PA.n;
     size=PA.size;
     delete pia;
     pia=new (int [size]);
     for (int i=0;i<size;i++)
         pia[i]=PA.pia[i];
    return *this;
    }

//
    IntArray::~IntArray()
    {
     delete pia;
    }

// Overload "+"
IntArray IntArray::operator+(const IntArray &PA)
    {
     IntArray tempA;
     tempA.m=m; tempA.n=n; tempA.size=size;     // initalize
     if (size!=PA.size)
       {
        cout<<"Can not add !\n";
        return 1;
       }
     for (int i=0;i<(size);i++)
     tempA.pia[i]=pia[i]+PA.pia[i];
     return tempA;
    }

// Overload "-"
IntArray IntArray::operator-(const IntArray &PA)
    {
     IntArray tempA;
     tempA.m=PA.m; tempA.n=PA.n;     // initalize !!
     tempA.size=PA.size;                        // initalize !!

if (size!=PA.size)
       {
        cout<<"Can not sub !\n";
        return 1;
       }
     for (int i=0;i<(size);i++)
     tempA.pia[i]=pia[i]-PA.pia[i];
     return tempA;
    }

// Overload "*"
IntArray IntArray::operator*(const IntArray &PA)
    {
     IntArray tempA;
     int tempI=0;

if (n!=PA.m)
       {
        cout<<"Can not plus !\n";
        return 1;
       }
     for (int i=0;i<(m-1);i++)
       for (int j=0;j<(PA.n-1);++j)
       {
        tempI=0;
        for (int k=0;k<(n-1);++k)
          tempI=tempI+pia[i*n+k]*PA.pia[k*n+j];
        tempA.pia[i*n+j]=tempI;
       }
     return tempA;
   }

/*
   // Overload "[]"     and left value
   int& IntArray::operator[] (int index1, int index2)
     {
     int index;
index=index1*n+index2;
     if ((index1<0).or.(index2<0).or.(index1>m).or.(index2>n))
       {
        cout<<"ARRAY index over !\n";
  return;
    }
       else
       return pia[index];
     }
   */

// Assign ARRAY element a value
   void IntArray::assign(int value,int index1,int index2)
      {
       int index;
       index=(index1-1)*n+(index2-1);
       pia[index]=value;
      }

void IntArray::chang_s(int mm,int nn)
     {
      m=mm; n=nn;
      size=m*n;
      delete pia;
      pia=new (int[size]);
      for (int l=0;l<size;++l)
          pia[l]=0;                  // initalize

}

void IntArray::show1(int index1,int index2)
     {
       cout<<pia[((index1-1)*n)+(index2-1)]<<" ";
     }

void IntArray::show()
    {
     int counter=0;
     // cout<<"\nNow in IntAray::show()\n";
     cout<<"size="<<size<<"\n";
     for (int i=0;i<size;i++)
      {
        // cout<<"\nNow in loop for OF IntArray::show()\n";
        counter=counter+1;
        cout<<pia[i]<<" ";
        if (counter==n) { cout<<"\n";counter=0;}    //MATIX line RETURN
      }
     cout<<"\n\n";    // END MATIX SHOW
    }

main()
{
int m1=1,n1=1,value1,ii,jj;
IntArray A1,A2,A3,A4,A5;

while (m1!=0)
   {
    // Beginning of   (Input a ARRAY, and display it:)
    cout<<"\007"<<"Please input the ARRAY1 size:"<<flush;
    cin>>m1>>n1;

    // PROCESS USER WANT TO EXIT    (1)
    if ((m1==0)||(n1==0))
      {
       cout<<" \n\n You want to EXIT !\n    BeCAUSE YOU INPUT 0 0";
       return 1;
      }

A1.chang_s(m1,n1); //Creat a ARRAY, and define it's size = m1*n1

m1=m1+1; n1=n1+1;
    for (int i=1;i<m1;i++)
      {
       for (int j=1;j<n1;j++)
         {
          cout<<" ARRAY["<<i<<","<<j<<"]="<<flush;
          cin>>value1;
          ii=i;jj=j;
          A1.assign(value1,ii,jj);
         }
       cout<<"\n";
      }

cout<<"\n Call A1.show()\n";
A1.show();

// Beginning of    (Input the other ARRAY, and display it:)
cout<<"\007"<<"Please input the ARRAY2 size:"<<flush;
cin>>m1>>n1;

if ((m1==0)||(n1==0))
{
   cout<<" \n\n You want to EXIT !\n    BeCAUSE YOU INPUT 0 0";
   return 1;
}

A2.chang_s(m1,n1); //Creat a ARRAY, and define it's size

m1=m1+1; n1=n1+1;
for (int i=1;i<m1;++i)
   {
    for (int j=1;j<n1;++j)
     {
      cout<<" ARRAY["<<i<<","<<j<<"]="<<flush;
      cin>>value1;
      ii=i; jj=j;
      A2.assign(value1,ii,jj);
     }
    cout<<"\n";
   }
A2.show();

//END OF (Input a ARRAY, and display it:)

A3=A1+A2;
A4=A2-A1;
A5=A1*A2;

A3.show();

A4.show();
// A5.show();

} //END OF WHILE

return 0;

}   // end of main()

C++源码：动态数组实例（1维）

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