HDU 1497 Simple Library Management System

这题是模拟题...不要想复杂了哦 呵呵

#include <stdio.h>
#include <stdlib.h>

struct Person{
    int num;
    int b[9];
    void init(){
        num = 0;
    }
};
Person person[1001];

int book[100001];

void makeset(int n){
    for(int i = 0; i <= n; ++i)
        book[i] = -1;
}
int main(){
    int m, n, times;
    while(scanf("%d%d",&m, &n) == 2){
        makeset(n);
        for(int i = 0; i <= m; ++i)
            person[i].init();        
        scanf("%d",×);
        while( times-- ){
            int x,user;
            char cmd[3];
            scanf("%s",cmd);
            switch(cmd[0])
            {
            case 'R':
                int x;
                scanf("%d",&x);
                if(book[x] == -1)
                    printf("The book is already in the library\n");
                else {
                    int temp;
                    int num = person[book[x]].num;
                    for(int j = 0; j < num; ++j){
                        if(person[book[x]].b[j] == x){
                            temp = j;
                        }
                    }
                    for(int j = temp; j < num; j++){
                        person[book[x]].b[j] = person[book[x]].b[j + 1];
                    }
                    person[book[x]].num--;
                    book[x] = -1;
                    printf("Return success\n");
                }
                break;
            case 'Q':
                scanf("%d",&user);
                if(person[user].num == 0){
                    printf("Empty\n");
                } else {
                    int num = person[user].num;
                    for(int i = 0; i < num; ++i){
                        for(int j = num-1; j > i; --j){
                            if(person[user].b[i] > person[user].b[j]){
                                int t = person[user].b[i];
                                person[user].b[i]  = person[user].b[j];
                                person[user].b[j] = t;  
                            }
                        }
                    }
                    for(int i = 0; i < num; ++i){
                        if( i != 0 )
                            printf(" ");
                        printf("%d",person[user].b[i]);
                    }
                    printf("\n");
                }
                break;
            case 'B':
                scanf("%d%d",&user, &x);
                if(book[x] != -1){
                    printf("The book is not in the library now\n");
                } else {
                    if(person[user].num >= 9){
                        printf("You are not allowed to borrow any more\n");
                    } else {
                        int num = person[user].num;
                        person[user].b[num++] = x;
                        person[user].num++;
                        book[x] = user;
                        printf("Borrow success\n");
                    }                    
                }
                break;
            }
            
            
        }
        printf("\n");
    }    
    return 0;
}