C/C++ 重载+运算符重载加号 实现矩阵相加

#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<<"请输入2*3个整数"<<endl;
t2.input();
cout<<endl;
cout<<"请输入2*3个整数"<<endl;
t3.input();
cout<<endl;
cout<<"t2";
t2.display();
cout<<"t3";
t3.display();
t4=t2+t3;
cout<<"t4=t2+t3=";
t4.display();
return 0;
}