How to Find the Even Fibonacci in C++

This is the simple and logic building C++ exercise for beginners. The program will find the Even Fibonacci number in a given array.

Source Code 

#include <iostream>
using namespace std;
void welcomeScrean(void);
void evenFibonacci(void);

int main()
{
 system ("color F0");
 
 welcomeScrean();
 
 evenFibonacci();
 
 return 0;
 
}

void welcomeScrean(void){
  cout<<"\a"
  <<"\t*******************************************************"<<endl
  <<"\t**                                                   **"<<endl
  <<"\t**                   Welcome To                      **"<<endl
  <<"\t**                                                   **"<<endl
  <<"\t**               Find Even Fibonacci                 **"<<endl
  <<"\t**                                                   **"<<endl
  <<"\t**                 and there sum                     **"<<endl
  <<"\t**                                                   **"<<endl
  <<"\t**                    Program                        **"<<endl
  <<"\t**                                                   **"<<endl
  <<"\t*******************************************************"<<endl
  <<endl
  <<endl;
}

void evenFibonacci(void){
 

 int num,count=0;
    long previous =1, next =0,sum;
    cout<<"\t Enter Your Number to Find Fibonacci ";
    cin>>num;

 cout<<"\n\t First "<<num<<" Even Fibonacci Numbers Are \n";
    
 do{
  if(previous%2==0){
      cout<<"\n\t "<<previous<<" ";
      count++;
  }
        sum = previous+next;
        next = previous;
        previous = sum;
        
    }while(count!=num);
    
}

Output of the Program