2.cpp

/*
PROBLEM 2:
Each new term in the Fibonacci sequence is generated by adding 
the previous two terms. By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...

By considering the terms in the Fibonacci sequence whose values do not 
exceed four million, find the sum of the even-valued terms.
*/
#include<iostream>

using namespace std; 

int main(){

    int previous=1,number=1, former=0;
    int final = 0;
    int limit=10;
    cout << " " << number;

    while(number<=limit)
    {
        if (number==1)
        {
            number+=previous;
            previous=1;
            cout << " " << number;
        }
        else
        {
            former=number;
            number+=previous;   
            previous=former;
            cout << " " << number;
        }
    }
    cout << "\nEND\n";


}