add two complex numbers

Description:

C++ program to add two complex numbers by passing objects to a function Test Case 1 Input (stdin) 7 -2 1 6 Expected Output 8+4i Test Case 2 Input (stdin) 70 -2 1 8 Expected Output 71+6i

Program :

#include<iostream>
using namespace std;
class complex
{
 int re,im;
 public:
  void get()
  {
   cin>>re>>im;
  }
  void disp()
  {
   cout<<re<<"+"<<im<<"i";
 
  }
  void sum(complex,complex);
};
void complex::sum(complex c1,complex c2)
{
 re=c1.re+c2.re;
 im=c1.im+c2.im;
}
int main()
{
 complex c1,c2,c3;
 
 c1.get();
 
 c2.get();
 
 
 c3.sum(c1,c2);
 
 c3.disp();
 
}