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36 lines
789 B
C++
36 lines
789 B
C++
/**
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* @file
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* @brief Generate fibonacci sequence
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*
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* Calculate the the value on Fibonacci's sequence given an
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* integer as input.
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* \f[\text{fib}(n) = \text{fib}(n-1) + \text{fib}(n-2)\f]
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*
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* @see fibonacci_large.cpp, fibonacci_fast.cpp, string_fibonacci.cpp
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*/
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#include <cassert>
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#include <iostream>
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/**
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* Recursively compute sequences
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*/
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int fibonacci(unsigned int n)
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{
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/* If the input is 0 or 1 just return the same
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This will set the first 2 values of the sequence */
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if (n <= 1)
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return n;
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/* Add the last 2 values of the sequence to get next */
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return fibonacci(n - 1) + fibonacci(n - 2);
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}
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/// Main function
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int main()
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{
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int n;
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std::cin >> n;
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assert(n >= 0);
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std::cout << "F(" << n << ")= " << fibonacci(n) << std::endl;
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}
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