Fibonacci function by using simple recursive approach, C/C++ Programming

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Implement, in rPeANUt, the a Fibonacci function by using the simple recursive approach. The Fibonacci function can be implemented in c as follow:

int fib(int x) {

if (x<2) {

return x;

} else {

return fib(x-1) + fib(x-2);

}

Test your implementation (e.g. fib(5) == 5, fib(7) == 13, fib(8) == 21)? What is the biggest Fibonacci number you can calculate in under about 1min of execution time?

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