先决条件：查找给定日期的星期几
给定年份N ，任务是为给定年份的每个月打印日历。
执行：
// C program to print the month by month
// calendar for the given year
#include
// Function that returns the index of the
// day for date DD/MM/YYYY
int dayNumber(int day, int month, int year)
{
static int t[] = { 0, 3, 2, 5, 0, 3,
5, 1, 4, 6, 2, 4 };
year -= month < 3;
return (year + year / 4
- year / 100
+ year / 400
+ t[month - 1] + day)
% 7;
}
// Function that returns the name of the
// month for the given month Number
// January - 0, February - 1 and so on
char* getMonthName(int monthNumber)
{
char* month;
switch (monthNumber) {
case 0:
month = "January";
break;
case 1:
month = "February";
break;
case 2:
month = "March";
break;
case 3:
month = "April";
break;
case 4:
month = "May";
break;
case 5:
month = "June";
break;
case 6:
month = "July";
break;
case 7:
month = "August";
break;
case 8:
month = "September";
break;
case 9:
month = "October";
break;
case 10:
month = "November";
break;
case 11:
month = "December";
break;
}
return month;
}
// Function to return the number of days
// in a month
int numberOfDays(int monthNumber, int year)
{
// January
if (monthNumber == 0)
return (31);
// February
if (monthNumber == 1) {
// If the year is leap then Feb
// has 29 days
if (year % 400 == 0
|| (year % 4 == 0
&& year % 100 != 0))
return (29);
else
return (28);
}
// March
if (monthNumber == 2)
return (31);
// April
if (monthNumber == 3)
return (30);
// May
if (monthNumber == 4)
return (31);
// June
if (monthNumber == 5)
return (30);
// July
if (monthNumber == 6)
return (31);
// August
if (monthNumber == 7)
return (31);
// September
if (monthNumber == 8)
return (30);
// October
if (monthNumber == 9)
return (31);
// November
if (monthNumber == 10)
return (30);
// December
if (monthNumber == 11)
return (31);
}
// Function to print the calendar of
// the given year
void printCalendar(int year)
{
printf(" Calendar - %d\n\n", year);
int days;
// Index of the day from 0 to 6
int current = dayNumber(1, 1, year);
// i for Iterate through months
// j for Iterate through days
// of the month - i
for (int i = 0; i < 12; i++) {
days = numberOfDays(i, year);
// Print the current month name
printf("\n ------------%s-------------\n",
getMonthName(i));
// Print the columns
printf(" Sun Mon Tue Wed Thu Fri Sat\n");
// Print appropriate spaces
int k;
for (k = 0; k < current; k++)
printf(" ");
for (int j = 1; j <= days; j++) {
printf("%5d", j);
if (++k > 6) {
k = 0;
printf("\n");
}
}
if (k)
printf("\n");
current = k;
}
return;
}
// Driver Code
int main()
{
int year = 2016;
// Function Call
printCalendar(year);
return 0;
}
输出：
Calendar - 2016
------------January-------------
Sun Mon Tue Wed Thu Fri Sat
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31
------------February-------------
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29
------------March-------------
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
------------April-------------
Sun Mon Tue Wed Thu Fri Sat
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
------------May-------------
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31
------------June-------------
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30
------------July-------------
Sun Mon Tue Wed Thu Fri Sat
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31
------------August-------------
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31
------------September-------------
Sun Mon Tue Wed Thu Fri Sat
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30
------------October-------------
Sun Mon Tue Wed Thu Fri Sat
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31
------------November-------------
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30
------------December-------------
Sun Mon Tue Wed Thu Fri Sat
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
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