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Use while instead of using recursive in C++ (#19320)

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Phan Nguyễn Tuấn Kiệt
2018-10-15 23:46:42 +07:00
committed by Todd Chaffee
parent 1920b0b4fa
commit 619f955faa
1 changed files with 3 additions and 4 deletions
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7
client/src/pages/guide/english/algorithms/search-algorithms/binary-search/index.md
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@ -181,14 +181,13 @@ int binarySearch(int a[], int l, int r, int x) {
```C++ ```C++
int binary_search(int arr[], int l, int r, int target) int binary_search(int arr[], int l, int r, int target)
{ {
if (r >= l) while (r >= l)
{ {
int mid = l + (r - l)/2; int mid = l + (r - l)/2;
if (arr[mid] == target) if (arr[mid] == target)
return mid; return mid;
if (arr[mid] > target) if (arr[mid] > target) r = mid - 1;
return binary_search(arr, l, mid-1, target); else l = mid + 1;
return binary_search(arr, mid+1, r, target);
} }
return -1; return -1;
} }