编了一个程序用来判断所输入的日子是这一年的第几天。代码如下:
#include<stdio.h>

int main()
{
    int pdprn(int x);
    int year,month,day,ts=0,n=0;
    int sum[11] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30 };
    int sumr[11] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30 };
    printf("请输入年月日。（格式：****年**月**日）\n");
    scanf_s("%d年%d月%d日",&year,&month,&day);
    if (month <= 1)
    {
        ts = day;
        printf("%d年%d月%d日是%d年的第%d天。\n",year,month,day,year,ts);
    }
    else if (pdprn(year) == 0)
    {
        while (n <= month - 2)
            ts = ts + sumr[n++];
        ts = ts + day;
        printf("%d年%d月%d日是%d年的第%d天。\n",year,month,day,year,ts);

    }
    else
    {
        while (n <= month - 2)
            ts = ts + sum[n++];
        ts = ts + day ;
        printf("%d年%d月%d日是%d年的第%d天。\n",year,month,day,year,ts);
    }
    return 0;
}
int pdprn(int x)
{
    if (x % 100 == 0)
    {
        if (x % 400 == 0)
            return 0;
        else
            return 1;
    }
    else if (x % 4 == 0)
        return 0;
    else
        return 1;
}
运行后会报错
error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup
fatal error LNK1120: 1 unresolved externals
这两个错误，问题出到哪了？？

http://bbs.

創建項目錯了，_WinMain()是Windows窗體程序的入口，説明你創建了Windows項目，而非控制臺Console項目。

啊，多谢，重新创建了控制台项目果然没错了。

这个让也让我学习到了很多，多谢！

这个让也让我学习到了很多，多谢！