Go語言計算指定年月天數的方法

2020-04-01 19:18:23

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這篇文章主要介紹了Go語言計算指定年月天數的方法,實例分析了Go語言操作時間的技巧,具有一定參考借鑒價值,需要的朋友可以參考下

本文實例講述了Go語言計算指定年月天數的方法。分享給大家供大家參考。具體實現方法如下：

復制代碼代碼如下:

		package main
		import (
		    "fmt"
		    "bufio"
		    "os"
		    "regexp"
		    "strconv"
		)
		func main() {
		    year := input("year", "^[0-9]{1}[0-9]{3}$")
		    month := input("month", "^(0{1}[0-9]{1}|1{1}[0-2]{1})$")
		    count(year, month)
		    fmt.Println("Press Enter button to continue ...")
		    reader := bufio.NewReader(os.Stdin)
		    lastInput, _, err := reader.ReadRune()
		    if err != nil {
		        fmt.Fprintln(os.Stderr, "Occur error when input (last) '", lastInput, "':", err)
		    }
		    return
		}
		func count(year int, month int) (days int) {
		    if month != 2 {
		        if month == 4 || month == 6 || month == 9 || month == 11 {
		            days = 30
		 
		        } else {
		            days = 31
		            fmt.Fprintln(os.Stdout, "The month has 31 days");
		        }
		    } else {
		        if (((year % 4) == 0 && (year % 100) != 0) || (year % 400) == 0) {
		            days = 29
		        } else {
		            days = 28
		        }
		    }
		    fmt.Fprintf(os.Stdout, "The %d-%d has %d days./n", year, month, days)
		    return
		}
		func input(name string, regexpText string) (number int) {
		    var validNumber = false
		    for !validNumber {
		        fmt.Println("Please input a", name, ": ")
		        reader := bufio.NewReader(os.Stdin)
		        inputBytes, _, err := reader.ReadLine()
		        if err != nil {
		            fmt.Fprintln(os.Stderr, "Occur error when input", name, ":", err)
		            continue
		        }
		        inputText := string(inputBytes)
		        validNumber, err = regexp.MatchString(regexpText, inputText)
		        if err != nil {
		            fmt.Fprintln(os.Stderr, "Occur error when match", name, "(", inputText, "):",err)
		            continue
		        }
		        if validNumber {
		            number, err = strconv.Atoi(inputText)
		            if err != nil {
		                fmt.Fprintln(os.Stderr, "Occur error when convert", name, "(", inputText, "):", err)
		                continue
		            }
		        } else {
		            fmt.Fprintln(os.Stdout, "The", name, "(", inputText, ") does not have the correct format!")
		        }
		    }
		    fmt.Println("The input", name, ": ", number)
		    return
		}