इस C++ प्रोग्राम में हम फाइबोनैचि संख्याओं का उपयोग करते हुए एक फूट डालो और जीतो दृष्टिकोण लागू करते हैं। फाइबोनैचि संख्याओं का उपयोग करके, हम डेटा आइटम को खोजने के लिए मध्य डेटा सरणी की गणना करते हैं। इस दृष्टिकोण की समय जटिलता O(log(n)) है।
एल्गोरिदम
Begin Assign the data to the array in a sorted manner. Take input of the element to be searched. Call FibonacciSearch() function. Calculate the mid value using ‘start+fib[index-2]’ expression. If the chosen item is equal to the value at mid index, print result and return to main. If it is lesser than the value at mid index, proceed with the left sub-array. If it is more than the value at mid index, proceed with the right sub-array. If the calculated mid value is equal to either start or end then the item is not found in the array. End
उदाहरण कोड
#include<iostream> using namespace std; void FibonacciSearch(int *a, int start, int end, int *fib, int index, int item) { int i, mid; mid = start+fib[index-2]; if(item == a[mid]) { cout<<"\n item found at "<<mid<<" index."; return; } else if(item == a[start]) { cout<<"\n item found at "<<start<<" index."; return; } else if(item == a[end]) { cout<<"\n item found at "<<end<<" index."; return; } else if(mid == start || mid == end) { cout<<"\nElement not found"; return; } else if(item > a[mid]) FibonacciSearch(a, mid, end, fib, index-1, item); else FibonacciSearch(a, start, mid, fib, index-2, item); } main() { int n, i, fib[20], a[10]={3, 7, 55, 86, 7, 15, 26, 30, 46, 95}; char ch; fib[0] = 0; fib[1] = 1; i = 1; while(fib[i] < 10) { i++; fib[i] = fib[i-1] + fib[i-2]; } up: cout<<"\nEnter the Element to be searched: "; cin>>n; FibonacciSearch(a, 0, 9, fib, i, n); cout<<"\n\n\tDo you want to search more...enter choice(y/n)?"; cin>>ch; if(ch == 'y' || ch == 'Y') goto up; return 0; } }
आउटपुट
Enter the Element to be searched: 26 item found at 6 index. Do you want to search more...enter choice(y/n)?y Enter the Element to be searched: 45 item not found Do you want to search more...enter choice(y/n)?n