C语言打印某年日历

#include <stdio.h>

main(){
/*判断输入年份是否是闰年的函数*/
int isLeapYear(int);
/*判断每月天数的函数*/
int monthDays(int,int);
/*判断某个日期是星期几的函数*/
int getWeekDay(int,int,int);
/*输出某年某月月历的函数*/
void outMonthDays(int,int);

  int Year,Month;
  printf("请输入年份:");
  scanf("%d",&Year);
  printf("%d年日历为:\n",Year);
  printf("----------------------------------------------\n");
  for(Month=1;Month<=12;Month++){
    outMonthDays(Year,Month);
  }
  return 0;
}
/*判断闰年函数的具体实现*/
int isLeapYear(int Year){
  if(Year%4==0 && Year%100!=0 || Year%400==0)
    return 1;
  return 0;
}
/*判断每月天数的具体实现*/
int monthDays(int Year,int Month){
 if(Month == 1 || Month == 3 || Month == 5 || Month == 7 || Month == 8 || Month == 10 || Month == 12){
    return 31;
 }else if(Month == 4 || Month == 6 || Month == 9 || Month == 11){
    return 30;
 }else{
    if(isLeapYear(Year))
        return 29;
    return 28;
 }
}
/*判断某年某月某号是周几的具体实现*/
int getWeekDay(int Year,int Month,int Day){
  int i,temp,weekday,Days=0;
  for(i=1;i<=Month-1;i++){
    Days+=monthDays(Year,i);
  }
  Days = Days + Day;
  temp = (Year-1)+(Year-1)/4-(Year-1)/100+(Year-1)/400+Days;
  weekday = temp % 7;
  return weekday;
}
/*打印某年某月日历的具体实现*/
void outMonthDays(int Year,int Month){
  int i,j,weekday;
  printf("%d年%d月日历\n",Year,Month);
  printf("  日  一  二  三  四  五  六\n");
  weekday = getWeekDay(Year,Month,1);
    for(i=0;i<weekday;i++){
    printf("    ");
  }
  for(j=1;j<=monthDays(Year,Month);j++){
    printf("%4d",j);
    if((j+weekday)%7==0){
        printf("\n");
    }
  }
  printf("\n");
printf("--------------------------------------------------------\n");
}
#include <stdio.h>

main(){