练习1

输出日历：

 1 #include<iostream>
 2 
 3 using namespace std;
 4 
 5 int mm[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
 6 
 7 // 闰年判断
 8 bool isLeap(int y)
 9 {
10     return ((y%4 == 0 && y%100 != 0) || (y%400 == 0));
11 } 
12 
13 // 基姆拉尔森计算公式
14 int week(int y, int m, int d)
15 {
16     if(m == 1 || m == 2){
17         m += 12;y--;
18     }
19     int r = (d + 2*m + 3*(m+1)/5 + y + y/4 - y/100 + y/400 + 1)%7;
20     return (r == 0)?7:r;
21 }
22 
23 void cal(int year)
24 {
25     if(isLeap(year)) mm[2] = 29;
26     for(int i=1;i<=12;i++){
27         cout<<"---Mouth:"<<i<<"---
";
28         int s = week(year, i, 1)%7;
29         for(int t=0;t<=s-1;t++) cout<<"	";
30         for(int j=1;j<=mm[i];j++){
31             cout<<j<<'	';
32             if(!((++s)%7)) cout<<'
';
33          }
34          cout<<"
-----------------------------------------------------
";
35     }
36 }
37 
38 int main()
39 {
40     int y, m, d;
41     // while(cin>>y>>m>>d)
42     while(cin>>y)
43     {
44         // 检测
45         /*
46         int s = 1;
47         for(int i=1;i<=12;i++){
48             for(int j=1;j<=mm[i];j++){
49                 cout<<week(y, i, j)<<'	';
50                 if(s%7 == 0) cout<<'
';
51                 s++;
52             }
53         }
54         */
55         // cout<<week(y, m, d)<<'
';
56         cal(y);
57         
58     }
59     
60     return 0;
61  }
2019-03-19
23:27:48