DiagonalMatrix.cpp

#include <iostream>
using namespace std;

class Diagonal
{
private:
 int *A;
 int n;
public:
 Diagonal()
 {
   n = 2;
   A = new int[2];
 }
 Diagonal(int n)
 {
   this->n=n;
   A=new int[n];
 }
 ~Diagonal()
 {
   delete []A;
 }
 void Set(int i,int j,int x);
 int Get(int i,int j);
 void Display();
 int GetDimension(){return n;}
};
void Diagonal::Set(int i,int j,int x)
{
 if(i==j)
 A[i-1]=x;
}
int Diagonal::Get(int i,int j)
{
 if(i==j)
 return A[i-1];
 return 0;
}
void Diagonal::Display()
{
 for(int i=1;i<=n;i++)
 {
 for(int j=1;j<=n;j++)
 {
   if(i==j)
   cout<<A[i-1]<<" ";
   else
   cout<<"0 ";
 }
 cout<<endl;
 }
}

int main()
{
 int d;
 cout<<"Enter Dimensions";
 cin>>d;

 Diagonal diagonal{d};
 int x;

 cout<<"Enter All Elements";
 for(int i=1;i<=d;i++)
 {

 for(int j=1;j<=d;j++)
 {
   cin>>x;
   diagonal.Set(i,j,x);
 }

 }

 diagonal.Display();
 return 0;
}