hdu2133: http://acm.hdu.edu.cn/showproblem.php?pid=2133
題意（解法）：已知0年1月1日是周6，輸入一個日期，問星期幾 code： #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> int tianshu1[]={31,28,31,30,31,30,31,31,30,31,30,31}; int tianshu2[]={31,29,31,30,31,30,31,31,30,31,30,31}; char tab[7][10]={"Saturday","Sunday","Monday","Tuesday","Wednesday","Thursday","Friday"}; bool runnian(int n) {if((n%4==0&&n%100!=0)||n%400==0)return true;elsereturn false; } int main() {int y,m,d;while(scanf("%d%d%d",&y,&m,&d)!=EOF){int ans=0;if(m==0||d==0||(!runnian(y)&&d>tianshu1[m-1])||(runnian(y)&&d>tianshu2[m-1])){printf("illegal\n");continue;}for(int i=0;i<y;i++){if(runnian(i))ans=ans+366;elseans=ans+365;}for(int i=1;i<m;i++){if(runnian(y))ans=ans+tianshu2[i-1];elseans=ans+tianshu1[i-1];}ans=ans+d-1;printf("%s\n",tab[ans%7]);} } /*input: 2007 11 17 output: Saturday*/

轉(zhuǎn)載于:https://www.cnblogs.com/acmjun/archive/2012/07/25/2608957.html

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