C language solar calendar

int week(int y，int m，int d)；

void main()

{

int month day[ 12]= { 3 1，28，3 1，30，3 1，30，3 1，30，3 1，30，3 1 }；

int y，w，I，m= 1，d = 1；

Printf ("Please enter the year yyyy: \ n");

scanf("%d "，& ampy)；

if(y % 4 = = 0 & amp； & ampy% 100！ = 0)month day[ 1]= 29；

for(m = 1； m & lt= 12; m++)

{

Printf("\n %d year, %d month \n ",y, m);

printf(" S M T w T F S \ n ")；

for(d = 1； d & lt= month day[m- 1]； d++)

{

W = week (y, m, d);

If (d== 1)

{

for(I = 0； I & ltw；; i++)printf(" ")；

}

if(d & lt； 10) printf("%d "，d)；

else printf("%d "，d)；

if(w = = 6)printf(" \ n ")；

}

}

}

int week (int y，int m，int d)

{

int w；

if((m== 1)||(m==2))

{

y-；

m+= 12；

}

w =(d+2 * m+3 *(m+ 1)/5+y+y/4-y/ 100+y/400+ 1)% 7；

Return (w);

}

The running results are as follows:

Please enter the year yyyy:

200 1

200 1 year, 1 month

S M T w T F S

1 2 3 4 5 6

7 8 9 10 1 1 12 13

14 15 16 17 18 19 20

2 1 22 23 24 25 26 27

28 29 30 3 1

200 1, February

S M T w T F S

1 2 3

4 5 6 7 8 9 10

1 1 12 13 14 15 16 17

18 19 20 2 1 22 23 24

25 26 27 28

200 1, March

S M T w T F S

1 2 3

4 5 6 7 8 9 10

1 1 12 13 14 15 16 17

18 19 20 2 1 22 23 24

25 26 27 28 29 30 3 1

200 1, April

S M T w T F S

1 2 3 4 5 6 7

8 9 10 1 1 12 13 14

15 16 17 18 19 20 2 1

22 23 24 25 26 27 28

29 30

200 1, May

S M T w T F S

1 2 3 4 5

6 7 8 9 10 1 1 12

13 14 15 16 17 18 19

20 2 1 22 23 24 25 26

27 28 29 30 3 1

200 1, June

S M T w T F S

1 2

3 4 5 6 7 8 9

10 1 1 12 13 14 15 16

17 18 19 20 2 1 22 23

24 25 26 27 28 29 30

200 1, July

S M T w T F S

1 2 3 4 5 6 7

8 9 10 1 1 12 13 14

15 16 17 18 19 20 2 1

22 23 24 25 26 27 28

29 30 3 1

200 1, August

S M T w T F S

1 2 3 4

5 6 7 8 9 10 1 1

12 13 14 15 16 17 18

19 20 2 1 22 23 24 25

26 27 28 29 30 3 1

200 1, September

S M T w T F S

1

2 3 4 5 6 7 8

9 10 1 1 12 13 14 15

16 17 18 19 20 2 1 22

23 24 25 26 27 28 29

30

200 1 year,1month

S M T w T F S

1 2 3 4 5 6

7 8 9 10 1 1 12 13

14 15 16 17 18 19 20

2 1 22 23 24 25 26 27

28 29 30 3 1

200 1 year, 1 1 month

S M T w T F S

1 2 3

4 5 6 7 8 9 10

1 1 12 13 14 15 16 17

18 19 20 2 1 22 23 24

25 26 27 28 29 30

200 1, 65438+ February

S M T w T F S

1

2 3 4 5 6 7 8

9 10 1 1 12 13 14 15

16 17 18 19 20 2 1 22

23 24 25 26 27 28 29

30 3 1 Please press any key to continue. ...