请帮忙看看我的C语言程序代码，为什么总是提示错误？

题目是这样的：编写一个程序输入年份和第几天，则然后输出几月几日。比如输入2000年第61天则输入3月1日。下面是我写的一段代码，可是软件总是提示有一个错误，但是尝试修改多次还是无济于事，不知是哪里出错，请各位高手帮忙看看，帮忙找一下我到底哪里错了，十分感谢哈！（刚才没有上传成功，这次是了）

源代码：

   #include "stdio.h"
#include "stdio.h"
void main()
{
int day,month,year,yearday;
void month_day(int year,int yearday,int*pmonth,int*pday);

printf("input year and yearday\n");
scanf("%d%d",&year,&yearday);
month_day(year,yearday,&month,&day);
printf("%d-%d",month,day);
}

void month_day(int year,int yearday,int*pmonth,int*pday);
{
int k,leap;
int tab[2][13]={
    {0,31,28,31,30,31,30,31,31,30,31,30,31}
 {0,31,29,31,30,31,30,31,31,30,31,30,31}
};

leap=year%4==0&&year%100!=0||year%400==0;
for(k=1;yearday>tab[leap][k];k++)
   yearday=yearday-tab[leap][k];
*pmonth=k;
*pday=yearday;
}

提示错误是：

 --------------------Configuration: 14 - Win32 Debug--------------------
Compiling...
14.cpp
D:\C\14.cpp(15) : error C2447: missing function header (old-style formal list?)
执行 cl.exe 时出错.

14.obj - 1 error(s), 0 warning(s)

大致意思是主函数丢失，可是我还是不知到什么意思，大家帮帮忙哈，谢谢！

改成下面这样就行了，主要是对二维数组 tab的赋值不对

#include "stdio.h"
void main()
{
int day,month,year,yearday;
void month_day(int year,int yearday,int*pmonth,int*pday);

printf("input year and yearday\n");
scanf("%d%d",&year,&yearday);
month_day(year,yearday,&month,&day);
printf("%d-%d",month,day);
}

void month_day(int year,int yearday,int*pmonth,int*pday)
{
int k,leap;
int tab[2][13]={0,31,28,31,30,31,30,31,31,30,31,30,31,
0,31,29,31,30,31,30,31,31,30,31,30,31};
leap=year%4==0&&year%100!=0||year%400==0;
for(k=1;yearday>tab[leap][k];k++)
   yearday=yearday-tab[leap][k];
*pmonth=k;
*pday=yearday;
}

你没包含有void month_day(int year,int yearday,int*pmonth,int*pday);函数的头文件，

我帮你编译好了，你这样复制上去就对了

#include "stdio.h" #include "stdio.h"  main() { int day,month,year,yearday; void month_day(int year,int yearday,int*pmonth,int*pday);

printf("input year and yearday\n"); scanf("%d%d",&year,&yearday); month_day(year,yearday,&month,&day); printf("%d-%d",month,day); }

void month_day(int year,int yearday,int*pmonth,int*pday) { int k,leap; int tab[2][13]={     {0,31,28,31,30,31,30,31,31,30,31,30,31}

};

leap=year%4==0&&year%100!=0||year%400==0; for(k=1;yearday>tab[leap][k];k++)    yearday=yearday-tab[leap][k]; *pmonth=k; *pday=yearday; }

错误1：函数申明应放在main函数的前面，而不是放在main函数中（即main函数第三行“void month_day(int year,int yearday,int*pmonth,int*pday);“应放在main之前）。

错误2：在定义函数 month_day 时，其后不能加分号。