求用C语言编写打印万年历的程序代码

#include
int monthDay(int,int);
int IsLeapYear(int);
main()
{
int days,weekDay,year,month=1,d,i;
printf("please input the year:\n");
scanf("%d",&year);
days=year-1+(year-1)/400+(year-1)/4-(year-1)/100;

while(month<=12){
printf("\t\t\t%d-%d\n",year,month);
printf("Sun\tMon\tTues\tWed\tThur\tFir\tSat\n");
d=1,i=1;
weekDay=(days+1)%7;
while(i<=weekDay)
{
printf("\t");
i++;
}
while(d<=monthDay(month,year))
{

weekDay=(days+1)%7;

if(weekDay==6)
printf("%d\n",d);
else
printf("%d\t",d);
if(d==monthDay(month,year))
printf("\n");
d++;
days++;

}
month++;
}
system("PAUSE");
return 0;
}

int monthDay(int month, int year)
{
switch(month){
case 1:case 3:case 5:case 7:case 8:case 10:case 12:
return 31;
break;
case 4: case 6:case 9:case 11:
return 30;
break;
case 2:
if((IsLeapYear(year))==1)

return 29;
else
return 28;
break;
}
}
int IsLeapYear(int year)
{

if((year%4==0)&&(year%100!=0))

return 1;
if(year%400==0)
return 1;

return 0;
}