图书馆借书系统

#include<stdio.h>
#include<string.h>
#include<conio.h>
#define N 6   //给后面c数组用
struct library{
  int NUM;
  char book[100];
  float money;
  char name[50];
  char sign[100];
};
void lookup(struct library *L)
{ 
  int n,i;
  do{
    printf("输入想查找书的编号(按0退出查看功能)：");
    scanf("%d",&n);   //搜索书编号
    for(i=0;i<10;i++)
      {
        if(n == (L+i)->NUM)   //如果输入的书编号等于NUM的值，就打印当前NUM值下的信息
        { 
          printf(" 编号：%d \t书名：%s  \t价钱：%.2f \t借阅人：%s  \t状态：%s\n", (L+i)->NUM,(L+i)->book,(L+i)->money,(L+i)->name,(L+i)->sign);
        }
      }
  }while(n!=0); //0退出查书
  printf("借书(1)or离开(0)\n");
  scanf("%d",&n);

  if(n==0)
    printf("算了，走了\n");

  else if(n==1)
  { 
    int j,inp; char c[N];
    printf("--load--\n");
    printf("\n");
    printf("请输入你想借阅的书编号:\n");
    scanf("%d",&inp);  //输入要借的书编号
    getchar();
    for(j=0;j<10;j++)
    { 
      if(inp == (L+j)->NUM)   //如果输入的书编号当前等于NUM的值
          {
            if(strlen((L+j)->sign)==8)    //如果是8，也就是Loanable的长度，代表没有被借出
            { 
              printf("输入姓名标记借出\n");
              gets(c);
              printf("\n");
              printf("|->回车键确认借出<-|\n");
              getch();
              strcpy((L+j)->name,c);    //将姓名替换到当前name的值
              strcpy((L+j)->sign,"done"); //用done把Loanable替换了
              printf("Success!\n");
              printf(" 编号：%d \t书名：%s  \t价钱：%.2f \t借阅人：%s  \t状态：%s\n",(L+j)->NUM,(L+j)->book,(L+j)->money,(L+j)->name,(L+j)->sign);
            }
            else
              printf("此书也被借出\n");
          }
    }
  }
}
int main()
{
  struct library LIB[]={  //编号、书名、价格、借阅人姓名(none是没有人)、是否借出标记(done是已借出，Loanale是可借出的)
    {1,"《Pride and Prejudice》",42.20,"yangwz","done"},      
    {2,"《Ulysses》",36.10,"none","Loanable"},
    {3,"《Moby-Dick》",25.00,"yangyl","done"},
    {4,"《To Kill A Mockingbird》",31.21,"none","Loanable"},
    {5,"《The Big Sleep》",19.99,"none","Loanable"},
    {6,"《Lord of the flies》",29.99,"none","Loanable"},
    {7,"《Jane Eyre》",60.20,"none","Loanable"},
    {8,"《FLIPPED》",20.6,"yangzw","done"},
    {9,"《Tuesdays with Morrie》",21.4,"none","Loanable"},
    {10,"《Sweetbitter》",44.44,"yangwwz","done"},
  };
  lookup(LIB);
  return 0;
}