用C語言實現一個日曆顯示
阿新 • • 發佈:2019-02-19
#include <stdio.h> #include <stdlib.h> #define SIGN_WEEK 6 #define SIGN_YEAR 2000 int month_day[14]={31,31,0,31,30,31,30,31,31,30,31,30,31,31}; char month_name[12][10]={"January","February","March","Apirl","May","June","July","August","September","October","November","December"}; void calendar(int week,int year) //顯示日曆 { int i,j,n,m,num0=0,num1=31,nweek0=week,nweek1; if(year%4==0) { if(year%100!=0) month_day[2]=29; else { if(year%400==0) month_day[2]=29; else month_day[2]=28; } } else month_day[2]=28; system("CLS"); printf("The calendar of the year %d\n\n",year); for(m=0;m!=12;m+=2) { if(m-1<0) { nweek0=week; nweek1=(week+num1%7)>7?(week+num1%7)-7:(week+num1%7); } else { num0=num0+month_day[m-1]+month_day[m]; nweek0=(week+num0%7)>7?(week+num0%7)-7:(week+num0%7); num1=num1+month_day[m]+month_day[m+1]; nweek1=(week+num1%7)>7?(week+num1%7)-7:(week+num1%7); } printf("%-10s %2d %-10s %2d\n=========================== ===========================\nSun Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat\n",month_name[m],m+1,month_name[m+1],m+2); for(i=nweek0,j=nweek1,n=0;j!=nweek1-6*7;j--) { if(n<7) { if(i>0) printf("%3d ",month_day[m]-i+1); else if(i<=0) { if(i>-month_day[m+1]) printf("%3d ",-i+1); else printf("%3d ",-i-month_day[m+1]+1); } i--; j+=1; n++; } else { if(j>0) printf("%3d ",month_day[m+1]-j+1); else if(j<=0) { if(j>-month_day[m+2]) printf("%3d ",-j+1); else printf("%3d ",-j-month_day[m+2]+1); } n++; } if(n==14) { printf("\n"); n=0; } } printf("=========================== ===========================\n\n"); } } void ShowMonth(int week,int year,int month) { int i,n,num0=0,nweek0,day=0; if(year%4==0) { if(year%100!=0) month_day[2]=29; else { if(year%400==0) month_day[2]=29; else month_day[2]=28; } } else month_day[2]=28; for(int j=1;j!=month;j++) { day+=month_day[j]; } nweek0=(week+day%7)>7?(week+day%7)-7:(week+day%7); system("CLS"); printf("%-10s %2d\n===========================\nSun Mon Tue Wed Thu Fri Sat\n",month_name[month-1],month); for(i=nweek0,n=0;i!=nweek0-6*7;i--) { if(n<7) { if(i>0) printf("%3d ",month_day[month-1]-i+1); else if(i<=0) { if(i>-month_day[month]) printf("%3d ",-i+1); else printf("%3d ",-i-month_day[month]+1); } n++; } if(n==7) { printf("\n"); n=0; } } printf("===========================\n\n"); } int startWeek(int year) //確定需要顯示的年份的第一天是星期幾 { int start_week,days; if(year>SIGN_YEAR) { days=(year-SIGN_YEAR)*365+(year-SIGN_YEAR)/4-(year-SIGN_YEAR)/100+(year-SIGN_YEAR)/400+(((year-SIGN_YEAR)%4)+3)/4+((year-SIGN_YEAR)%400==0?0:((year-SIGN_YEAR)%100==0?1:0)); start_week=(SIGN_WEEK+days%7)>7?(SIGN_WEEK+days%7)-7:(SIGN_WEEK+days%7); } else { days=(SIGN_YEAR-year)*365+(SIGN_YEAR-year)/4-(SIGN_YEAR-year)/100+(SIGN_YEAR-year)/400; start_week=(SIGN_WEEK-days%7)>0?(SIGN_WEEK-days%7):(SIGN_WEEK-days%7+7); } return start_week; } int main() { int year,month,start_week,i; printf("1.日曆\n2.查詢\n3.指定月份日曆\nSelect:"); scanf("%d",&i); if(i==1) { printf("Enter year:"); scanf("%d",&year); start_week=startWeek(year); calendar(start_week,year); } else if(i==2) { //function 2 code } else if(i==3) { printf("請指定月份(XXXX-XX):\n"); scanf("%d-%d",&year,&month); start_week=startWeek(year); ShowMonth(start_week,year,month); } getchar(); getchar(); return 0; }