#include<stdio.h>
int main()
{
    void c(int a,int b,int c);
    int days[12]={31,28,31,30,31,30,31,31,30,31,30,31};
    int day,m,y,nub=0,i;
    printf("Please enter year,month,day:\n");
    scanf("%d,%d,%d",&y,&m,&day);
    c(y,m,day);
    if((y%4==0&&y%100!=0)||y%400==0)
        days[2]=days[2]+1;
    for(i=0;i<m-1;i++)
    nub=nub+days[i];
    printf("the day is %d\n",nub+day);
    return 0;
}

void c(int a,int b,int c)
{
   
    if(a<1||b<1||b>12||c<1||c>31)
    {
        printf("Eorror!!Please check year,month,day!\n");
        printf("Please enter year,month,day:\n");
        scanf("%d,%d,%d",&y,&m,&day);

    }
}
是求某年某月某日是该年的第几天的程序，C是一个查错函数，但我不知道怎么在主函数内调用才正确，求大家帮帮忙