Answer 1

when they say google is your friend:
" a series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc."
a simple code could look like this:

int a=0; //variable to store first number to add
int b=1;//variable to store second number to add
int fibonacciLength=8;//desired length of the fibonacci series
for (int i=0; i< fibonacciLength; i++){
int c=a+b;//variable to hold the sum the two numbers
cout<<c;//print the sum
a=b;//update first number for next calculation
b=c//update second number for next calculation
}// the for loop will repeat until the desired length of the series is complete