藍橋杯 2012 國慶星期幾

2019-11-10 17:07:55

字體：大中小

來源：轉載

供稿：網友

【結果填空】 (滿分5分) 1949年的國慶節（10月1日）是星期六。今年（2012）的國慶節是星期一。那么，從建國到現在，有幾次國慶節正好是星期日呢？只要答案，不限手段！可以用windows日歷，windows計算器，Excel公式，。。。。。當然，也可以編程！不要求寫出具體是哪些年，只要一個數目！千萬不要提交源代碼！答案不要寫在這里，寫在“解答.txt”中

有趣的題目,我就來有趣的搞一下首先linux下 date命令可以查看當前時間

$ dateWed Feb 8 21:04:26 CST 2017

拿有沒高級用法呢

$ man date

發現的

-d, --date=STRING display time described by STRING, not 'now' %x locale's date rePResentation (e.g., 12/31/99)

試一下

$ date -d "10/01/1949"Sat Oct 1 00:00:00 CST 1949

可以,很強然后用System的命令

#include <bits/stdc++.h>using namespace std;int main(){ for (int i = 1949; i <= 2012; i++) { stringstream ss; ss << i; string s; ss >> s; string cmd = "date -d 10/01/" + s; system(cmd.c_str()); }}

得到輸出

Sat Oct 1 00:00:00 CST 1949Sun Oct 1 00:00:00 CST 1950Mon Oct 1 00:00:00 CST 1951Wed Oct 1 00:00:00 CST 1952Thu Oct 1 00:00:00 CST 1953Fri Oct 1 00:00:00 CST 1954Sat Oct 1 00:00:00 CST 1955Mon Oct 1 00:00:00 CST 1956Tue Oct 1 00:00:00 CST 1957Wed Oct 1 00:00:00 CST 1958Thu Oct 1 00:00:00 CST 1959Sat Oct 1 00:00:00 CST 1960Sun Oct 1 00:00:00 CST 1961Mon Oct 1 00:00:00 CST 1962Tue Oct 1 00:00:00 CST 1963Thu Oct 1 00:00:00 CST 1964Fri Oct 1 00:00:00 CST 1965Sat Oct 1 00:00:00 CST 1966Sun Oct 1 00:00:00 CST 1967Tue Oct 1 00:00:00 CST 1968Wed Oct 1 00:00:00 CST 1969Thu Oct 1 00:00:00 CST 1970Fri Oct 1 00:00:00 CST 1971Sun Oct 1 00:00:00 CST 1972Mon Oct 1 00:00:00 CST 1973Tue Oct 1 00:00:00 CST 1974Wed Oct 1 00:00:00 CST 1975Fri Oct 1 00:00:00 CST 1976Sat Oct 1 00:00:00 CST 1977Sun Oct 1 00:00:00 CST 1978Mon Oct 1 00:00:00 CST 1979Wed Oct 1 00:00:00 CST 1980Thu Oct 1 00:00:00 CST 1981Fri Oct 1 00:00:00 CST 1982Sat Oct 1 00:00:00 CST 1983Mon Oct 1 00:00:00 CST 1984Tue Oct 1 00:00:00 CST 1985Wed Oct 1 00:00:00 CST 1986Thu Oct 1 00:00:00 CST 1987Sat Oct 1 00:00:00 CST 1988Sun Oct 1 00:00:00 CST 1989Mon Oct 1 00:00:00 CST 1990Tue Oct 1 00:00:00 CST 1991Thu Oct 1 00:00:00 CST 1992Fri Oct 1 00:00:00 CST 1993Sat Oct 1 00:00:00 CST 1994Sun Oct 1 00:00:00 CST 1995Tue Oct 1 00:00:00 CST 1996Wed Oct 1 00:00:00 CST 1997Thu Oct 1 00:00:00 CST 1998Fri Oct 1 00:00:00 CST 1999Sun Oct 1 00:00:00 CST 2000Mon Oct 1 00:00:00 CST 2001Tue Oct 1 00:00:00 CST 2002Wed Oct 1 00:00:00 CST 2003Fri Oct 1 00:00:00 CST 2004Sat Oct 1 00:00:00 CST 2005Sun Oct 1 00:00:00 CST 2006Mon Oct 1 00:00:00 CST 2007Wed Oct 1 00:00:00 CST 2008Thu Oct 1 00:00:00 CST 2009Fri Oct 1 00:00:00 CST 2010Sat Oct 1 00:00:00 CST 2011Mon Oct 1 00:00:00 CST 2012

使用管道,將輸出重定向到文本文件 cal

./Untitled1 > cal

現在處理cal就好了

#include <bits/stdc++.h>using namespace std;int main(){ freopen("cal", "r", stdin); string s; int ans = 0; while (cin >> s) ans += (s == "Sun"); cout << ans << endl;}

答案 9

這種搞法Windwos肯定行不通的,到時候再議 : )

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