题目是这样的,计算日期(含年,月,日)是该年的第几天,大家帮忙帮我看看程序
#include<stdio.h>
int str(struct boy a);
int main(void)
{
    struct boy{
        int year;
        int month;
        int day;}a={2004,11,30};
    int w;
    w=str(a);
    printf("%d",w);}
int str(struct boy a)
{
        int x[12]={31,28,31,30,31,30,31,31,30,31,30,31};
        int count=0,i;
        count=a.day;
       printf("%d\n",count);
        for(i=0;i<a.month-1;i++)
            count+=x[i];
        printf("%d\n",count);
        if(a.month>2&&((a.year%4==0)&&(a.year%100!=0)||(a.year%400==0)))
        count=count+1;   
        printf("%d\n",count);
        return (count);
}

把结构作为参数传进去,就报错了,晕,大家帮忙看看哪错了呀?

结构体类型定义不能放在主函数中，否则他是局部的，只能在主函数有效。

好像定义的struct（）{}；
一定加分号

#include<stdio.h>

struct boy {
        int year;
        int month;
        int day;
}a={2004,11,30};

int main (void) {
        int str(struct boy a);
        printf("%d\n",str(a));
        return 0;
}
int str(struct boy a) {
        int x[12]={31,28,31,30,31,30,31,31,30,31,30,31};
        int count=0,i;
        for(i=0;i<a.month;i++)
                count+=x[i];
        if(((a.year%4==0)&&(a.year%100!=0))||(a.year%400==0))
                count=count+1;
        return count;
}

[ 本帖最后由 ansic 于 2011-4-30 23:43 编辑 ]

你的结构体不是全局的，只是main函数中有效。

struct boy{
        int year;
        int month;
        int day;}a;
int str(struct boy a)
{       int x[12]={31,28,31,30,31,30,31,31,30,31,30,31};
        int count=0,i;
        count=a.day;
        for(i=0;i<a.month-1;i++)
        count+=x[i];
        if(a.month>2&&((a.year%4==0)&&(a.year%100!=0)||(a.year%400==0)))
        count=count+1;   
        return (count);
}
main()
{
        scanf("%d%d%d",&a.year,&a.month,&a.day);
    int w;
    w=str(a);
    printf("%d",w);
getch();
}