题目相关
【题目解读】
【原题描述】原题链接
Implement int sqrt(int x).
Compute and return the square root of x, where x is guaranteed to be a non-negative integer.
Since the return type is an integer, the decimal digits are truncated and only the integer part of the result is returned.
Example 1:
Input: 4
Output: 2
Example 2:
Input: 8
Output: 2
Explanation: The square root of 8 is 2.82842..., and since
the decimal part is truncated, 2 is returned.
【难度】Easy
Solution
1. 调用已有的库函数
#include <math.h>
class Solution {
public:
int mySqrt(int x) {
if(x < 0)
{
return 0;
}
return sqrt(x);
}
};
运行效果: