Example code for matrix addition in C++ with overload and operator overload plus sign

The C++ overload + operator overload plus adds matrices

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Example code:

#include<iostream>
#include<iomanip>
using namespace std;
class Complex
{
  private:
    int i,j,n,a[2][3];
  public:
    Complex();
    Complex operator+(Complex &c);
    void display();
    void input();
} t1;


Complex::Complex()
 {
 for(int i=0;i<2;i++)
 for(int j=0;j<3;j++)
 a[i][j]=0;
 } 


 void Complex::input()
 {
  for(i=0;i<2;i++)
   for(j=0;j<3;j++)
   cin>>a[i][j];
 } 
 void Complex::display()
 {
  n=1;
  for(i=0;i<2;i++)
   for(j=0;j<3;j++)
   {
    n++;
    if(n%2==0)
    cout<<endl;
    cout<<setw(5)<<a[i][j];
   }
   cout<<endl; 
 }
Complex Complex::operator+(Complex &c)
{
  for(int i=0;i<2;i++) 
   for(int j=0;j<3;j++) 
  t1.a[i][j]=a[i][j]+c.a[i][j];
  return t1; 
}

int main()
{
  Complex t2,t3,t4;
  cout<<" Please enter the 2*3 An integer "<<endl; 
  t2.input();
  cout<<endl;
  cout<<" Please enter the 2*3 An integer "<<endl; 
  t3.input();
  cout<<endl;
  cout<<"t2";
  t2.display();
  cout<<"t3";
  t3.display();
  t4=t2+t3;
  cout<<"t4=t2+t3=";
  t4.display();
  return 0;
} 

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