不能使用sqrt函数,得到x的平方根的整数部分(x>0)。
package main
import "fmt"
func mySqrt(x int) int {
var left = 0
var right = x
for left<=right{
mid := (left+right)/2
if mid*mid==x{
return mid
}else if mid*mid<x{
left = mid+1
}else if mid*mid>x{
right = mid-1
}
}
return right
}
func main(){
fmt.Println(mySqrt(24))
}