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54 lines
1018 B
Go
54 lines
1018 B
Go
// Copyright 2020, Chef. All rights reserved.
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// https://github.com/q191201771/naza
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//
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// Use of this source code is governed by a MIT-style license
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// that can be found in the License file.
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//
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// Author: Chef (191201771@qq.com)
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package main
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import (
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"fmt"
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//"sort"
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)
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// 把 sort.Search 拷过来，加些单步日志
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func SearchWithLog(n int, f func(int) bool) int {
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i, j := 0, n
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for i < j {
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h := int(uint(i+j) >> 1)
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fmt.Printf("i=%d, j=%d, h=%d", i, j, h)
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if !f(h) {
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fmt.Println(" not match.")
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i = h + 1
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} else {
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fmt.Println("match.")
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j = h
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}
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}
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return i
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}
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func main() {
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const key = 3
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//const key = 0
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//const key = 2
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//const key = 9
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arr := []int{1, 3, 5, 7}
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index := SearchWithLog(len(arr), func(i int) bool {
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//return arr[i] == 3
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return arr[i] >= key
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})
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fmt.Printf("index=%d\n", index)
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if index < len(arr) && arr[index] == key {
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fmt.Println("exist")
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} else {
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fmt.Println("not exist")
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}
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//var tmp uint
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//tmp = uint(2147483647 + 2147483647)
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//fmt.Println(tmp)
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}
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