這是我的復活節計算器的代碼。工作正常，想知道是否有一種方法可以提高效率（尤其是月份選擇部分）。if 語句非常長，想知道我是否可以使用數組來選擇月份。對于將來的參考，這樣的 if 語句將非常耗時，感謝您的反饋。import java.util.*;import java.lang.Math;class Main { public static void main(String[] args) { Scanner userInput = new Scanner(System.in); System.out.println("\nWelcome to the Easter Calculator. Please enter the current year below."); int y = userInput.nextInt(); int p = y/100; int q = y - (19*(y/19)); int r = (p-17)/25; int s = p - (p/4) - ((p-r)/3) + (19*q) + 15; s = s - (30*(s/30)); s = s - ((s/28)*1-((s/28)*(29/(s+1))*((21-q)/11))); int t = y + (y/4) + s + 2 - p + (p/4); t = t - (7*(t/7)); int u = s - t; int m = 3 + ((u+40)/44); int d = u + 28 - (31*(m/4)); String month; if(m == 1){ month = "January"; } else if(m == 2){ month = "February"; } else if(m == 3){ month = "March"; } else if(m == 4){ month = "April"; } else if(m == 5){ month = "May"; } else if(m == 6){ month = "June"; } else if(m == 7){ month = "July"; } else if(m == 8){ month = "August"; } else if(m == 9){ month = "September"; } else if(m == 10){ month = "October"; } else if(m == 11){ month = "November"; } else{ month = "December"; } System.out.println("\nEaster will be on "+month+" "+d+", "+y+"."); }}
4 回答
喵喔喔
TA貢獻1735條經驗 獲得超5個贊
可能用最少的代碼行進行最快的解碼是通過一個字符串數組，我們稱之為monthNames，包含所有月份的名稱。它的長度為 12，并且由于數組索引是從 0 開始的，因此您必須以這種方式獲取字符串，例如第 1 個月的字符串：String month = monthNames[m-1];
皈依舞
TA貢獻1851條經驗 獲得超3個贊
其他人提到過，但我也會選擇數組
就像是：
String month = "";
int m = 1; // january
String[] months = {"January", "Febuary", "March", "April", "May", "June", "July", "August",
"September", "October", "November", "December"};
month = months[m-1];
狐的傳說
TA貢獻1804條經驗 獲得超3個贊
switch 語句和字符串數組一樣有效。我發現該數組更容易使用！
//Array to hold each month of the year
String monthArray[] = {"January", "Febuary", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
//Final output statement stating the month, day, and year easter will be held.
System.out.println("\nEaster will be on "+monthArray[m-1]+" "+d+", "+y+".");
守著一只汪
TA貢獻1872條經驗 獲得超4個贊
我建議使用 switch 語句。這里有一些可以讓你開始的事情：
switch(m) {
case 1: month = "January";
break;
case 2: month = "February";
break;
case 3: month = "March";
break;
case 4: month = "April";
break;
...
case 11: month = "November";
break;
default: month = "December";
}
另外，我建議正確縮進代碼，這樣如果出現任何問題，可以更輕松地閱讀和調試。另外，我建議為變量指定有意義的名稱。單字母名稱沒有多大意義，因此很快就會變得非常混亂。
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