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; else return 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;}