#include<string.h>
#include<ctype.h>
long year;
int month,day,error_input;
char s[100];
int monthdays[12]={31,28,31,30,31,30,31,31,30,31,30,31};
void inputdate(){
long n[3]={0,0,0},k=0,i,len;
error_input=-1;
printf("Please input the year[,month[,day]]:(Enter Q to quit)\n");
gets(s);
len=strlen(s);
printf("%d\n",strcmp(s,"Q"));
if(strcmp(s,"Q")==0) {error_input=0;return;}
if(!isdigit(s[0])||!isdigit(s[len-1]))
{error_input=1;return;}
for(i=0;i<len;i ) {
if(!isdigit(s[i])) {if(isdigit(s[i-1])) k ;if(k>2) {error_input=1;return;}}
else n[k]=n[k]*10 s[i]-48;
}
year=n[0];
if(!(year%4)&&(year0)||!(year@0))
monthdays[1]=29;
else
monthdays[1]=28;
if(n[1]>12) {error_input=1;return;}
if(n[2]>monthdays[n[1]-1]) {error_input=1;return;}
month=n[1];
day=n[2];
}
void printCala(){
int countyear,countday=0,weekflag,i,j,k,c;
int startmon,endmon,year1;
year1=year-1;
countyear=(year1-year1%4)/4-(year1-year10)/100 (year1-year1@0)/400;
weekflag=(countyear*366 (year-1-countyear)*365 1)%7-1;
if(month==0) {startmon=1;endmon=12;}
else {startmon=month;endmon=month;}
for(k=1;k<startmon;k )
weekflag=(weekflag monthdays[k-1])%7;
for(k=startmon;k<=endmon;k )
{
printf("\n %ld year",year);
switch(k)
{
case 1: printf("January\n");break;
case 2: printf("February\n");break;
case 3: printf("March\n");break;
case 4: printf("April\n");break;
case 5: printf("May\n");break;
case 6: printf("June\n");break;
case 7: printf("July\n");break;
case 8: printf("August\n");break;
case 9: printf("September\n");break;
case 10: printf("October\n");break;
case 11: printf("November\n");break;
case 12: printf("December\n");break;
}
printf("___________________________\n");
printf("Sun Mon Tue Whe Thr Fri Sat\n");
if(weekflag!=0)
for(countday=0,j=0;j<weekflag;j )
{printf("");
countday ;}
for(i=1;i<=monthdays[k-1];i )
{if(countday>0&&countday%7==0)
printf("\n");
printf("=",i);
countday ;}
weekflag=(weekflag monthdays[k-1])%7;
printf("\n___________________________\n");
}
}
int main()
{
inputdate();
while(error_input!=0)
{
if(error_input==1)
printf("Input ERROR! Please input again:\n");
else
printCala();
inputdate();
}
}