万年历代码C语言万年历编程

C语言万年历编程

#include<stdio.h> #include<time.h> int leap (int year)//判断闰年 { if(year%4==0&&year%100!=0||year%400==0) return 1; else return 0; } int days_month (int month,int year)//判断月 { if(month==1||month==3||month==5||month==7||month==8||month==10||month==12) return 31; if(month==4||month==6||month==9||month==11) return 30; if(month==2&&leap(year)==1) return 29; else return 28; } int firstday(int month,int year)//判断年 { int w; w=(1+2*month+3*(month+1)/5+year+year/4+year/400-year/100)%7+1; return w; } main() { //调用系统时间 time_al; struct tm *now; al = time(NULL); now = localtime(&al); printf("现在时间: %4d年 %d月 %02d日 %d:%02d:%02d ", now->tm_year+1900, now->tm_mon+1, now->tm_mday, now->tm_hour, now->tm_min, now->tm_sec); //调用结束 int i,j=1,k=1,a,b,month,year; b=days_month(now->tm_mon+1,now->tm_year+1900); a=firstday (now->tm_mon+1,now->tm_year+1900); printf(" Sun Mon Tue Wed Thu Fri Sat "); if(a==7) { for(i=1;i<=b;i++) { printf("%4d",i); if(i%7==0) { printf(" "); } } } if(a!=7) { while (j<=4*a) { printf(" "); j++; } for(i=1;i<=b;i++) { printf("%4d",i); if(i==7*k-a) { printf(" "); k++; } } } printf(" "); }

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