C语言实现万年历程序

#include <stdio.h>int year(int y)
{if ((y%4==0) && (y%100!=0) || y%400==0)return 366;elsereturn 365;
}int main()
{int y;int i,j,sum=0;	int begin,week;int days[12]={31,28,31,30,31,30,31,31,30,31,30,31};scanf("%d",&y);for(i=1;i<y;i++)sum+=year(i);week=(sum+1)%7;		//表示该年1月1日为星期几if(year(y)==366)days[1]=29;	printf("\n%d年日历如下：\n\n",y);for(i=0;i<12;i++){printf("       %d月          \n",i+1);printf("  7  1  2  3  4  5  6\n");printf("=====================\n");begin=1;for(j=0;j<week;j++)printf("   ");while(begin<=days[i]){printf("%3d",begin);begin++;week=(week+1)%7;if(week%7==0)printf("\n");}printf("\n\n");}return 0;
}