Question

c++ code that outputs the 25th number in the fibonacci sequence

Answer 1

#include<iostream>
using namespace std;

int fib(int n){
   int a,b,c;
   if(n == 1){
      return a;
   }
   if(n == 2){
      return b;
   }
   else{
      for(a = 0,b = 1;n>2;n--){
         c = a + b;
         a = b;
         b = c;
      }
      return c;
   }
}

int main(){
   int n = 25;
   
   cout<<n<<"th fibonacci number is "<<(fib(n))<<endl;
   return 0;
}