third commit

年历月历.c

@@ -0,0 +1,178 @@
+#include<stdio.h>
+#include<math.h>
+#include<stdlib.h>
+#include<>
+
+//                           每月天数 
+#include<math.h>
+int month_day(int year,int month)
+{
+	switch(month)
+        {
+            case 1:
+            case 3:
+            case 5:
+            case 7:
+            case 8:
+            case 10:
+            case 12:
+            return 31;break;
+            
+            case 4:
+            case 6:
+            case 9:
+            case 11:
+            return 30;break; 
+
+            case 2:
+            	if((year%4==0)&&(year%100!=0)||(year%400==0))
+            	{
+            		return 29;
+            		break;
+				}
+				else
+				{
+					return 28;
+					break;
+				}
+		}
+}
+
+
+//                       年历
+                                         
+void year_calendar(int year)
+{
+	int month,days,weekday,sum_day;
+	int i,j;
+    
+		year;
+		printf("请输入要查询的年份：");
+		scanf("%d",&year); 
+	for(i=1;i<year;i++)
+	{
+		if((year%4==0)&&(year%100!=0)||(year%400==0))
+		  sum_day+=366;
+		else
+		  sum_day+=365;	
+	}
+		for(month=1;month<=12;month++)
+		{
+		    printf("\n--------%d/%d--------\n",year,month);
+            printf("SUN\tMON\tTUE\tWED\tTHU\tFRI\tSAT\t\n");
+            i=1;
+            j=1;
+			weekday=sum_day%7;
+			while(i<=weekday)              //开始位置前都是空格 
+			{
+				printf("\t");
+				i++;
+			}
+			while(j<=month_day(year,month))
+			{
+				weekday=sum_day%7;
+				if (weekday==6)
+					printf("%d\n",j);
+					
+				else			
+					printf("%d\t",j);	
+
+				if(j==month_day(year,month))
+				    printf("\n");
+				
+				j++;
+				sum_day++;	
+			}
+		 } 
+}
+
+
+//                        月历 
+
+void month_calendar(int year,int month)
+{
+	int sum_day=0,weekday,i,j,k;
+	printf("请输入要查询的年/月：");
+	scanf("%d/%d",&year,&month); 
+	for(i=1;i<year;i++)
+	{
+		if((year%4==0)&&(year%100!=0)||(year%400==0))
+		  sum_day+=366;
+		else
+		  sum_day+=365;	
+	}
+	for(k=1;k<month;k++)
+	{
+	    sum_day+=month_day(year,month);
+	}
+
+		    printf("\n--------%d/%d--------\n",year,month);
+            printf("SUN\tMON\tTUE\tWED\tTHU\tFRI\tSAT\t\n");
+            i=1;
+            j=1;
+			weekday=sum_day%7;
+			while(i<=weekday)              //开始位置前都是空格 
+			{
+				printf("\t");
+				i++;
+			}
+			while(j<=month_day(year,month))
+			{
+				weekday=sum_day%7;
+				if (weekday==6)
+					printf("%d\n",j);
+					
+				else			
+					printf("%d\t",j);	
+
+				if(j==month_day(year,month))
+				    printf("\n");
+				
+				j++;
+				sum_day++;	
+			} 
+}
+
+//                                   距今多少天 
+
+struct tm
+{
+	int tm_sec;
+	int tm_min;
+	int tm_hour;
+	int tm_day;
+	int tm_month;
+	int tm_year;
+	int tm_weekday;
+	int tm_yearday;
+}
+
+
+int main(void)
+{
+	printf("\n-------------------选择服务-------------------\n\n");
+	printf("                   1.年历显示\n");
+	printf("                   2.月历显示\n");
+	printf("                   3.日期查询\n");
+	printf("                   4.距今多少天\n");
+	printf("                   5.退出\n");
+	printf("\n-------------------选择服务-------------------\n") ;
+	
+	int n,year,month,day;
+	printf("请选择服务：");
+	scanf("%d",&n);
+	switch(n)
+	{
+		case 1:
+			{
+				year_calendar(year);
+				break;
+			}
+		case 2:
+			{
+				month_calendar(year,month);
+				break;
+			}
+	}
+}
+