Find a specific number in an ordered array

Find a specific number in an ordered array, suppose we find n

#include <stdio.h>
#include <stdlib.h>
int main()
{ int arr[] = {1, 2, 3, 4, 5, 6, 7, 8 }; int k = 7; int sz = sizeof(arr) / sizeof(arr[0]);//Calculate the number of elements int left = 0;//left subscript int right = sz-1;//right subscript while (left<=right) {

	int mid = (left + right) / 2;
	if (arr[mid] > k)
	{
		right = mid - 1;
	}
	else if (arr[mid] < k)
	{
		left = mid + 1;
	}
	else
	{
		printf("找到了，下标是：%d\n", mid);
		break;
	}
}
if (left>right)
{
	printf("找不到\n");
}

system(“pause”);
return 0;
}