帮忙看看,这个程序哪儿出错了?

void week()
{
int a;
for(a=1;a<=7;a++) printf("星期a");
putchar('\n');
}
#include <stdio.h>
void main()
{
int month,b,c,d,e,f,g,h;
char day[6][7];
int sum[12]={31,28,31,30,31,30,31,31,30,31,30,31};
int temp[31];
for (b=0;b<=30;b++)
temp[b]=b+1;
printf("2010年日历\n");
for(month=1,f=4;month<=12;month++)
{
printf("%d月\n",month);
week;
putchar('\n');
for(c=0,e=0;c<=6&&e<=sum[month];c++)
{
for(d=0;d<=7&&e<=sum[month];d++,e++)
{
if(c=0&&d<=f) day[c][d]='\0';
else day[c][d]=temp[e];
}
}
f=d;
for(g=0;g<=6;g++)
{
for(h=0;h<=7;h++)
{
if (day[g][h]='\0') printf(" ");
else printf("%5d",day[g][h]);
}
putchar('\n');
}
}
}

1. int dayOfYear(int y,int m,int d)


2. {


3. int month[]={31,28,31,30,31,30,31,31,30,31,30,31};


4. if(isLeapYear(y)==1)


5. {


6. month[1]=29;


7. }


8. int i,sum=0;


9. for(i=0;i<m-1;i++)


10. {


11. sum=sum+month[i];


12. }


13. sum=sum+d;


14. return sum;


15. }




17. int isLeapYear(int year)


18. {


19. if(year%4==0)


20. {


21. if(year%100==0&&year%400!=0)


22. return 0;


23. else return 1;


24. }


25. else return 0;


26. }