就是 每三个月换一行.
2013年日历
一季
1,2,3
二季
4,5,6
三季
7,8,9
四季
10,11,12
谢谢啦..

#include <stdio.h>
void main()
{
int i,j,k,year=2013,week;
int day[]={31,28,31,30,31,30,31,31,30,31,30,31};
char month[12][10]={"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};
if((year%4==0&&year%100!=0)||(year%400==0)) day[1]++;
week=(35+year+year/4-year/100+year/400)%7; 
printf("2013年日历\n");
for(i=0;i<12;i++)
{
    if (i==3)
        printf("\n");
printf("\n%s\n\n",month[i]);
printf("日 一 二 三 四 五 六\n");
for(k=0;k<week;k++) printf("   ");
for(j=1;j<=day[i];j++) 
{
printf("%2d ",j);
if(++week>=7)
{
printf("\n");
week=week%7;
}
}
printf("\n");
}
}

多谢大神..学习了..