都是映射
传入参数,返回结果
不同:
函数:消耗计算资源
数组:消耗存储资源
算法中的时间换空间,空间换时间
C语言实现二分查找
#include <stdio.h>
int main()
{
int k = 0;
scanf("%d", &k);
int arr[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
int sz = sizeof(arr) / sizeof (arr[0]);
int low = 0;
int high = sz-1;
while (low <= high)
{
int mid = (low + high) / 2;
if (arr[mid] > k)
{
high = mid - 1;
}
else if (arr[mid] < k)
{
low = mid + 1;
}
else
{
printf("找到了,它是:%d", arr[a]);
break;
}
}
if (l>r)
printf("没找到,请重新输入");
return 0;
}
C++实现二分查找
#include <stdio.h>
int main()
{
int k = 0;
scanf("%d", &k);
int arr[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
int sz = sizeof(arr) / sizeof (arr[0]);
int low = 0;
int high = sz-1;
while (low <= high)
{
int mid = (low + high) / 2;
if (arr[mid] > k)
{
high = mid - 1;
}
else if (arr[mid] < k)
{
low = mid + 1;
}
else
{
printf("找到了,它是:%d", arr[a]);
break;
}
}
if (l>r)
printf("没找到,请重新输入");
return 0;
}