#include<stdio.h>
#define months 12
#include<assert.h>
void ReadDate(int x, int y, int z);
void CacuDate(int a, int b, int c, int days1[], int days2[], int x,  int y, int z);
main()
{
    int a, b, c, w;
    int x, y, z;   
    int days1[months] = {31,28,31,30,31,30,31,31,30,31,30,31};
    int days2[months] = {31,29,31,30,31,30,31,31,30,31,30,31};
    a = 2016;
    b = 11;
    c = 12;
    w = 6;
        printf("%d年%d月%d日是星期%d\n", a, b, c, w);
        ReadDate(x, y, z);
        CacuDate(a, b, c, days1, days2, x, y, z);
}
    void ReadDate(int x, int y, int z)
    {
        printf("Input year:x month:y day:z :\n");
        scanf("%d%d%d", &x, &y, &z);
        assert( y>=1 && y<=12 && z>=1 && z<= 31 );
    }


    void CacuDate(int a, int b, int c, int days1[], int days2[], int x, int y, int z)
    {   
        int i, j, n, sum1, sum2, sum3, sum;
        sum1 = c;
        sum = 0;
        sum3 = 0;
        n = z;

        if( x<a )
        {
            for( i=0; i<b-1; i++)
            {
                sum1 += days1[i];
            }

            if( x%4==0 && x%100==0 || x%400==0 )
            {
                for ( i=0; i<y-1; i++ )
                {
                    n += days2[i];
                }
                sum2 = 366-n;
            }
            else
            {
                for( i=0; i<y-1; i++)
                {
                    n += days1[i];
                }
                sum2 = 365-n;
            }


            for ( j=x; j<a-1; j++ )
            {
                if((j+1)%4==0 && (j+1)%100==0 || (j+1)%400==0 )
                {
                    sum3 += 366;
                }
                else
                {
                    sum3 += 365;
                }
            }
               
        }
        sum = sum1+sum2+sum3;
        printf("%d\n",sum);
   
    }
问题应该是处在函数CacuDate中了 麻烦好心人看一下.

简单看了下，main函数中的x,y,z没有进行初使化，经过ReadDate函数之后，x,y,z的值也没有变化，仍然是随机值。

谢谢啦 问题已经解决啦~