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Binary search without build-in functioon
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| #include<bits/stdc++.h> | |
| using namespace std; | |
| bool bnry_srch(int f , int *v , int n){ | |
| int low = 0, high = n; | |
| while(low<=high){ | |
| int c = (low+high)/2; | |
| if(v[c]==f) | |
| return true; | |
| if(v[c]>f) | |
| high = c-1; | |
| else | |
| low = c+1; | |
| } | |
| return false; | |
| } | |
| int main(){ | |
| int n , i , a; | |
| cout << "Select the range :"; | |
| cin >> n; | |
| int arr[n]; | |
| cout << "Input the array : "; | |
| for(i=0; i<n; i++){ | |
| cin >> arr[i]; | |
| } | |
| sort(arr,arr+n); | |
| int f; | |
| cout << "Number to search :"; | |
| cin >> f; | |
| if(bnry_srch(f , arr , n)) | |
| cout << "Yes,it's in the array" << endl; | |
| else | |
| cout << "Not in the array by binary search" << endl; | |
| } | |
| /*For build-in binary_search function:::::::::: | |
| ------------------------------------------------------------- | |
| if(binary_search(v.begin() , v.end() , f)) | |
| cout << "It's in a vector" << endl; | |
| else | |
| cout << "Not in the vector" << endl; | |
| ------------------------------------------------------------- | |
| */ |
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