달력 문제

#include<stdio.h>

int month[13]={0,1,2,3,4,5,6,7,8,9,10,11,12};

int day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};

char *weekname[7]={"일","월","화","수","목","금","토"};

int main(void)

{

int y=0,m=0;//년월일

int L_y=0;//작년

int total_day;//일수계산

int week=0;//요일

FILE *out; //출력파일

out=fopen("out.txt","w");

//입력

printf("Input Year : ");

scanf("%d",&y);

printf("Input month : ");

scanf("%d",&m);

//윤년계산

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

day[2]=29;

else

day[2]=28;

//요일 계산

L_y=y-1;

total_day=(L_y+(L_y/4)-(L_y/100)+(L_y/400)+1);

for(int i=1;i<m;i++)

total_day+=day[i];

week=total_day%7;

/////////출력///////////

//년,월 출력

printf("<%d_%02d>\n",y,m);

//요일 출력

for(int i=0;i<7;i++)

printf("%7s", weekname[i]);

printf("\n");

//공백 출력

for(int i=0;i<week;i++)

{

printf("%7c"," ");

}

for(int i=1;i<=day[m];++i)

{

if(week%7==0)

printf("\n");

printf("%7d",i);

week++;

}

fclose(out);

}