c语言万年历程序代码

#include <stdio.h>

int year(int y)

{

    if ((y%4==0) && (y%100!=0) || y%400==0)

        return 366;

    else

        return 365;

}

int main()

{

    int y;

    int i,j,sum=0; 

    int begin,week;

    int days[12]={31,28,31,30,31,30,31,31,30,31,30,31};

    scanf("%d",&y);

    for(i=1;i<y;i++)

        sum+=year(i);

    week=(sum+1)%7;     //表示该年1月1日为星期几

    if(year(y)==366)

        days[1]=29;

    printf("\n%d年日历如下：\n\n",y);

    for(i=0;i<12;i++)

    {

        printf("       %d月          \n",i+1);

        printf("  7  1  2  3  4  5  6\n");

        printf("=====================\n");

        begin=1;

        for(j=0;j<week;j++)

            printf("   ");

        while(begin<=days[i])

        {

            printf("%3d",begin);

            begin++;

            week=(week+1)%7;

            if(week%7==0)

                printf("\n");

        }

        printf("\n\n");

    }

    return 0;

}