수다닷컴

질문 내용 : #include stdio.h
int main()
{
int bookid[10] = {100901,100902,100903,100904,100905,100906,100907,100908,100909,100910};
int bookistaken[10] = {0,20081234,20083400,0,20052389,0,0,20081234,0,20070834};
char booktitle[10][40] = {data structures,programming in c,a brief history of time,think hard,the art of love,the last lecture,homo kungfus,the last lecture,the prophet,english grammar in use};
int i , num, x , y ;
while(1)
{
printf([menus] 1. display book list 2. borrow a book 3. quit :);
scanf(%d,&num);
if(num==3)
{
printf(good-bye!\n);
break;
}
switch(num)
{
case 1:
{
printf(-------------------------- book list ------------------ \n);
for(i=0; i10; i++)
{
printf(%d %-30s %12d \n, bookid[i] , booktitle[i] , bookistaken[i]);
}
printf(------------------------------------------------------- \n);
break;
}
case 2:
{
while(1)
{
printf(input a book id(0 for cancel):);
scanf(%d,&x);
if(x==0)
break;
for(i = 0; i 10; i++)
{
if(bookid[i] == x)
{
if(bookistaken[i]==0)
{
printf(input a student id(0 for cancel):);
scanf(%d,&y);
if(y==0)
break;
printf(done!\n);
bookistaken[i] = y;
break;
}
else
printf(it is not available. try another!\n);
}
}
break ;
}
}
}
}
return 0;
}

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