#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);}elseprintf("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;
}