first commit

年历显示.c

@@ -0,0 +1,125 @@
+#include<stdio.h>
+
+//判断闰年
+void f(year)
+{
+    int year,day;
+    if(year%4==0&&year%100!=0||year%400==0)
+    return 1;
+    else
+    return 0;
+}
+
+void max_day(int year,int month)
+{
+    int month_day[12]={31,28,31,30,31,30,31,31,30,31,30,31};
+    if(f(year)==1)
+    mouth[1]=29;
+    return month_day[month-1];
+}
+
+//year总天数
+void  max_day(int year,int month,int day)
+{
+	int sum=0,i;
+	for(i=1;i<month;i++)
+	{
+	    sum+=max_day(i);
+    }
+    sum+=day;
+	return sum;
+}
+
+
+//星期几 
+void Weekday(int year,int month,int day)
+{
+	int count,i,year_day,weekday;
+	for(i=1;i<year;i++)    //总天数 
+	{
+		if(f(i)==1)
+		year_day=366;
+		else
+		year_day=365;
+		count+=year_day;
+	}
+	count+=sum;
+	weekday=count%7;
+	return weekday;
+}
+//输出星期 
+void output_week(int year,int month,int day)
+{
+	int weekday;
+	Weekday(year,month,day);
+	switch(weekday)
+	{
+		case 0:
+		    printf("%d/%d/%d是星期天\n",year,month,day);
+		    break;
+		case 1:
+		    printf("%d/%d/%d是星期一\n",year,month,day);
+		    break;
+		case 2:
+		    printf("%d/%d/%d是星期二\n",year,month,day);
+		    break;
+		case 3:
+		    printf("%d/%d/%d是星期三\n",year,month,day);
+		    break;
+		case 4:
+		    printf("%d/%d/%d是星期四\n",year,month,day);
+		    break;
+		case 5:
+		    printf("%d/%d/%d是星期五\n",year,month,day);
+		    break;
+		case 6:
+		    printf("%d/%d/%d是星期六\n",year,month,day);
+		    break;
+	}
+}
+
+//年历
+void calendar(int year)
+{
+	int i,j,k,l;
+	for(i=1;i<=12;i++)
+	{
+		printf("%d\n",i);
+		printf("日 一 二 三 四 五 六 \n")；
+		for(j=0;j<weekday;j++)      //开始位置 
+		     printf("  ") ;
+		     l=1;
+		for(k=1;k<max_day(l);k++) 
+		{
+			l++;
+			printf("%2d",k);
+			if((k+weekday)%7==0)
+			   printf("\n");
+		 
+		    return 0;
+		}
+		
+		return 0;
+	}
+}
+
+
+void main()
+{
+	
+//开始输出
+printf("--------------------------选择服务--------------------------") ；
+printf("          1.日历显示")；
+printf("          2.日期查询")；
+printf("          3.距今多少天")；
+printf("          4.退出")；
+printf("--------------------------选择服务--------------------------") ；
+
+int n,year,month,day;
+scanf("%d",&n);
+switch (n)
+{
+	case 1:
+		scanf("%d",year);
+		calendar(year);
+}