quote:Originally posted by amahja56
c = a + b;
cout << " " << c;
a = b;
b = c;
Well, the Fibonacci sequence is one where each successive number in the sequence is the sum of the two previous numbers:
0 1 1 2 3 5 8 13...
Starting with 2, notice that:
2 = 1 + 1,
3 = 1 + 2,
5 = 2 + 3
8 = 3 + 5
13 = 5 + 8
c = a + b <-- This is the pattern using the variable names
defined in your for loop.
So basically what your loop is doing is calculating the current number, c, as the sum of the two previous numbers, a and b.
Once you output the value of c, then you set up your numbers for the next iteration.
The old value of b becomes the new value of a. The old value of c becomes the new value of b.
Thus, a and b are the two most recent consecutive numbers of the sequence. The next iteration will reassign the value of a + b to c, yielding the next sum in the series.
Often it makes everything a LOT more readable if you use proper indentation and spacing.