程序为什么单步执行没有问题，直接运行就会出现问题

#include<iostream>
#include<iomanip>
#include <stdlib.h>
using namespace std;

class Book
{
public:
	int book_id;
	char book_name[20];
	char writer[20];
	int now_number;
	int sum_number;
	Book();
};
class Member
{
public:
	int ID;
	int borrow_number;
	int borrow_book_id;
	int time;
	Member()
	{
		borrow_book_id=0;
		time=0;
		ID=0;
		borrow_number=0;
	}
};

class Node 
{
public:
    int data;
    Node* next;
    Node(int _data) 
	{
		data=_data;
        next = NULL;
    }
};
class Index 
{
private:
    Node* head;
public:
    Index() 
	{
        head = NULL;
    }
    void insert(Node *node, int index) 
	{
        if (head == NULL) 
		{
            head = node;
            return;
        }
        if (index == 0) 
		{
            node->next = head;
            head = node;
            return;
        }
        Node *current_node = head;
        int count = 0;
        while (current_node->next != NULL && count < index - 1) 
		{
            current_node = current_node->next;
            count++;
        }
        if (count == index - 1) 
		{
            node->next = current_node->next;
            current_node->next = node;
        }
    }
    void output() 
	{
        if (head == NULL) 
		{
            return;
        }
        Node *current_node = head;
        while (current_node != NULL) 
		{
            cout << current_node->data <<endl;
            current_node = current_node->next;
        }
        cout << endl;
    }
    void delete_node(int index)
	{
        if(head==NULL)
		{
			return ;
		}
        Node *current_node=head;
        int count=0;
        if(index==0)
		{
            head=head->next;
            delete current_node;
            return ;
        }
        while(current_node->next!=NULL&&count<index-1)
		{
            current_node=current_node->next;
            count++;
        }
        if(count==index-1 &&current_node->next!=NULL)
		{
            Node *delete_node=current_node->next;
            current_node->next=delete_node->next;
            delete delete_node;
        }
    }
	int serch(int index)
	{
		if (head == NULL) 
		{
            return 0;
        }
		Node *current_node = head;
		while(current_node->data!=index && current_node->next != NULL)
		{
			current_node=current_node->next;
		}
		if(current_node->data==index)
		{
			return 1;
		}
		else
		{
			return 0;
		}
	}
};

Book::Book()
{
	book_id=0;
	now_number=0;
	sum_number=0;
}

void add(Book *str_book,Index *str_index)
{
	system("cls");
	int new_id,count=0;
	cout<<"请输入图书的书号"<<endl;
	cin>>new_id;
	while(str_book->book_id==new_id||str_book->book_id==0)
	{
		str_book++;
		count++;
	}
	if(str_book->book_id==new_id)
	{
		cout<<"此图书存在，请输入增加库存量"<<endl;
		int i;
		cin>>i;
		str_book->sum_number=i;
	}
	else
	{
		int i;
		str_book->book_id=new_id;
		cout<<"请输入图书书名"<<endl;
		cin.ignore(1024,'\n');
		cin.getline(str_book->book_name,20);
		cout<<"作者姓名"<<endl;
		cin.getline(str_book->writer,20);
		cout<<"请输入采购量"<<endl;
		cin>>i;
		str_book->now_number=i;
		str_book->sum_number=i;
		cout<<"收录完毕"<<endl;
		cout<<"请按回车键确认"<<endl;
		getchar();
	}
}
void serch(Book *str_book)
{
	system("cls");
	int x;
	cout<<"请输入图书书号"<<endl;
	cin>>x;
	while(str_book->book_id==x||str_book->book_id==0)
	{
		str_book++;
	}
	if(str_book==0)
	{
		cout<<"对不起，没有此图书"<<endl;
	}
	else
	{
		cout<<"图书书号："<<str_book->book_id<<endl;
		cout<<"图书书名："<<str_book->book_name<<endl;
		cout<<"作者姓名："<<str_book->writer<<endl;
		cout<<"现存量："<<str_book->now_number<<endl;
		cout<<"库存量："<<str_book->sum_number<<endl;
	}
	getchar();
}

void borrow(Book *str_book,Member *str_member)
{
	system("cls");
	int x,y;
	cout<<"请输入借书会员号："<<endl;
	cin>>y;
	while(str_member->ID==y||str_member->ID==0)
	{
		str_member++;
	}
	if(str_member->ID==0)
	{
		cout<<"对不起，没有此会员"<<endl;
	}
	else
	{
		cout<<"请输入所借图书书号"<<endl;
		cin>>x;
		while(str_book->book_id==x||str_book->book_id==0)
		{
			str_book++;
		}
		if(str_book->book_id==0)
		{
			cout<<"对不起，没有此图书"<<endl;
		}
		else
		{
			if(str_book->now_number==0)
			{
				cout<<"图书库存为0，无法借阅"<<endl;
			}
			else
			{
				int y;
				cout<<"请输入借书时间："<<endl;
				cin>>y;
				str_member->time=y;
				str_book->now_number--;
				str_member->borrow_number++;
				str_member->borrow_book_id=x;
				cout<<"借书成功"<<endl;
			}
		}
	}
	getchar();
}

void get(Book *str_book,Member *str_member)
{
	system("cls");
	int x,y;
	cout<<"请输入归还图书会员号："<<endl;
	cin>>y;
	while(str_member->ID==y||str_member->ID==0)
	{
		str_member++;
	}
	if(str_member->ID==0)
	{
		cout<<"对不起，没有此会员"<<endl;
	}
	else
	{
		cout<<"请输入归还图书书号："<<endl;
		cin>>x;
		while(str_book->book_id==x||str_book->book_id==0)
		{
			str_book++;
		}
		if(str_book->book_id==0)
		{
			cout<<"对不起，没有此图书"<<endl;
		}
		else
		{
			str_book->now_number++;
			str_member->borrow_number--;
			str_member->time=0;
			str_member->borrow_book_id=0;
			cout<<"还书成功"<<endl;
		}
	}
	getchar();
}

void drop(Book *str_book,Index *str_index)
{
	system("cls");
	int x,count=0;
	cout<<"请输入删除图书书号："<<endl;
	cin>>x;
	while(str_book->book_id==x||str_book->book_id==0)
	{
		str_book++;
		count++;
	}
	if(str_book->book_id==0)
	{
		cout<<"对不起，没有此图书"<<endl;
	}
	else
	{
		while(str_book->book_id==0)
		{
			str_book[count]=str_book[count+1];
			count++;
			cout<<"删除成功"<<endl;
		}
	}
	getchar();
}

void add_member(Member *str_member)
{
	system("cls");
	while(str_member->ID==0)
	{
		str_member++;
	}
	cout<<"请输入会员ID："<<endl;
	cin>>str_member->ID;
	cout<<"增加成功"<<endl;
	getchar();
}

void serch_member(Member *str_member)
{
	system("cls");
	int y;
	cout<<"请输入查询会员号："<<endl;
	cin>>y;
	while(str_member->ID==y||str_member->ID==0)
	{
		str_member++;
	}
	if(str_member->ID==0)
	{
		cout<<"对不起，没有此会员"<<endl;
	}
	else
	{
		cout<<"会员ID为："<<str_member->ID<<endl;
		cout<<"会员所借图书册数为："<<str_member->borrow_number<<endl;
	}
	getchar();
}

void drop_member(Member *str_member)
{
	system("cls");
	int y,count=0;
	cout<<"请输入删除会员号："<<endl;
	cin>>y;
	while(str_member->ID==y||str_member->ID==0)
	{
		str_member++;
		count++;
	}
	if(str_member->ID==0)
	{
		cout<<"对不起，没有此会员"<<endl;
	}
	else
	{
		while(str_member->ID==0)
		{
			str_member[count]=str_member[count+1];
			count++;
			cout<<"删除成功"<<endl;
		}
	}
	getchar();
}

void borrow_book(Book *str_book,Member *str_member)
{
	system("cls");
	while(str_member->borrow_number==0)
	{
		cout<<'\t'<<setw(8)<<"会员ID"<<'\t'<<setw(8)<<"所借图书ID"<<'\t'<<setw(8)<<"借书期限"<<endl;
		cout<<'\t'<<setw(8)<<str_member->ID<<'\t'<<setw(8)<<str_member->borrow_book_id<<'\t'<<setw(8)<<str_member->time;
		str_member++;
	}
	getchar();
}

void put()
{
	system("cls");
	cout<<'\t'<<"********************欢迎进入图书馆借阅系统********************"<<endl;
	cout<<'\t'<<"********************  请选择所需要的功能  ********************"<<endl;
	cout<<'\t'<<"*****1 增加图书                               2 查询图书******"<<endl;
	cout<<'\t'<<"*****3 图书借阅                               4 归还图书******"<<endl;
	cout<<'\t'<<"*****5 删除图书                               6 增加会员******"<<endl;
	cout<<'\t'<<"*****7 查询会员                               8 删除会员******"<<endl;
	cout<<'\t'<<"*****9 借书信息                               0 退出系统******"<<endl;
	cout<<'\t'<<"*************************************************************"<<endl;
}
int main()
{

	int x;
	Member *str_member=new Member[100];
	Book *str_book=new Book[100];
	Index *str_index=new Index;
	while(1)
	{
		put();
		cin>>x;
		switch(x)
	{
	case 1:add(str_book,str_index) ;break;
	case 2:serch(str_book); break;
	case 3:borrow(str_book,str_member); break;
	case 4:get(str_book,str_member); break;
	case 5:drop(str_book,str_index); break;
	case 6:add_member(str_member); break;
	case 7:serch_member(str_member);break;
	case 8:drop_member(str_member);break;
	case 9:borrow_book(str_book,str_member);break;
	}
	}
}

以上是完整程序，每次进入主函数中while循环后，子程序就很快结束，直接回到循环

6 个解决方案

#1

目前好了，我发现是因子函数中while的判断条件错误了，已经改正如下

#include<iostream>
#include<iomanip>
#include <stdlib.h>
#include <windows.h>
using namespace std;

class Book
{
public:
	int book_id;
	char book_name[20];
	char writer[20];
	int now_number;
	int sum_number;
	Book();
};
class Member
{
public:
	int ID;
	int borrow_number;
	int borrow_book_id;
	int time;
	Member()
	{
		borrow_book_id=0;
		time=0;
		ID=0;
		borrow_number=0;
	}
};

class Node 
{
public:
    int data;
    Node* next;
    Node(int _data) 
	{
		data=_data;
        next = NULL;
    }
};
class Index 
{
private:
    Node* head;
public:
    Index() 
	{
        head = NULL;
    }
    void insert(Node *node, int index) 
	{
        if (head == NULL) 
		{
            head = node;
            return;
        }
        if (index == 0) 
		{
            node->next = head;
            head = node;
            return;
        }
        Node *current_node = head;
        int count = 0;
        while (current_node->next != NULL && count < index - 1) 
		{
            current_node = current_node->next;
            count++;
        }
        if (count == index - 1) 
		{
            node->next = current_node->next;
            current_node->next = node;
        }
    }
    void output() 
	{
        if (head == NULL) 
		{
            return;
        }
        Node *current_node = head;
        while (current_node != NULL) 
		{
            cout << current_node->data <<endl;
            current_node = current_node->next;
        }
        cout << endl;
    }
    void delete_node(int index)
	{
        if(head==NULL)
		{
			return ;
		}
        Node *current_node=head;
        int count=0;
        if(index==0)
		{
            head=head->next;
            delete current_node;
            return ;
        }
        while(current_node->next!=NULL&&count<index-1)
		{
            current_node=current_node->next;
            count++;
        }
        if(count==index-1 &&current_node->next!=NULL)
		{
            Node *delete_node=current_node->next;
            current_node->next=delete_node->next;
            delete delete_node;
        }
    }
	int serch(int index)
	{
		if (head == NULL) 
		{
            return 0;
        }
		Node *current_node = head;
		while(current_node->data!=index && current_node->next != NULL)
		{
			current_node=current_node->next;
		}
		if(current_node->data==index)
		{
			return 1;
		}
		else
		{
			return 0;
		}
	}
};

Book::Book()
{
	book_id=0;
	now_number=0;
	sum_number=0;
}

void add(Book *str_book,Index *str_index)
{
	system("cls");
	int new_id,count=0;
	cout<<"请输入图书的书号"<<endl;
	cin>>new_id;
	while(str_book->book_id!=new_id&&str_book->book_id==0)
	{
		str_book++;
		count++;
	}
	if(str_book->book_id==new_id)
	{
		cout<<"此图书存在，请输入增加库存量"<<endl;
		int i;
		cin>>i;
		str_book->sum_number=i;
	}
	else
	{
		int i;
		str_book->book_id=new_id;
		cout<<"请输入图书书名"<<endl;
		cin.ignore(1024,'\n');
		cin.getline(str_book->book_name,20);
		cout<<"作者姓名"<<endl;
		cin.getline(str_book->writer,20);
		cout<<"请输入采购量"<<endl;
		cin>>i;
		str_book->now_number=i;
		str_book->sum_number=i;
		cout<<"收录完毕"<<endl;
		cout<<"回到主程序"<<endl;
		Sleep(2000);
	}
}
void serch(Book *str_book)
{
	system("cls");
	int x;
	cout<<"请输入图书书号"<<endl;
	cin>>x;
	while(str_book->book_id!=x&&str_book->book_id!=0)
	{
		str_book++;
	}
	if(str_book->book_id==0)
	{
		cout<<"对不起，没有此图书"<<endl;
	}
	else
	{
		cout<<"图书书号："<<str_book->book_id<<endl;
		cout<<"图书书名："<<str_book->book_name<<endl;
		cout<<"作者姓名："<<str_book->writer<<endl;
		cout<<"现存量："<<str_book->now_number<<endl;
		cout<<"库存量："<<str_book->sum_number<<endl;
	}
	Sleep(2000);
}

void borrow(Book *str_book,Member *str_member)
{
	system("cls");
	int x,y;
	cout<<"请输入借书会员号："<<endl;
	cin>>y;
	while(str_member->ID!=y&&str_member->ID!=0)
	{
		str_member++;
	}
	if(str_member->ID==0)
	{
		cout<<"对不起，没有此会员"<<endl;
	}
	else
	{
		cout<<"请输入所借图书书号"<<endl;
		cin>>x;
		while(str_book->book_id!=y&&str_book->book_id!=0)
		{
			str_book++;
		}
		if(str_book->book_id==0)
		{
			cout<<"对不起，没有此图书"<<endl;
		}
		else
		{
			if(str_book->now_number==0)
			{
				cout<<"图书库存为0，无法借阅"<<endl;
			}
			else
			{
				int y;
				cout<<"请输入借书时间："<<endl;
				cin>>y;
				str_member->time=y;
				str_book->now_number--;
				str_member->borrow_number++;
				str_member->borrow_book_id=x;
				cout<<"借书成功"<<endl;
			}
		}
	}
	Sleep(2000);
}

void get(Book *str_book,Member *str_member)
{
	system("cls");
	int x,y;
	cout<<"请输入归还图书会员号："<<endl;
	cin>>y;
	while(str_member->ID!=y&&str_member->ID!=0)
	{
		str_member++;
	}
	if(str_member->ID==0)
	{
		cout<<"对不起，没有此会员"<<endl;
	}
	else
	{
		cout<<"请输入归还图书书号："<<endl;
		cin>>x;
		while(str_book->book_id!=y&&str_book->book_id!=0)
		{
			str_book++;
		}
		if(str_book->book_id==0)
		{
			cout<<"对不起，没有此图书"<<endl;
		}
		else
		{
			str_book->now_number++;
			str_member->borrow_number--;
			str_member->time=0;
			str_member->borrow_book_id=0;
			cout<<"还书成功"<<endl;
		}
	}
	Sleep(2000);
}

void drop(Book *str_book,Index *str_index)
{
	system("cls");
	int x,count=0;
	cout<<"请输入删除图书书号："<<endl;
	cin>>x;
	while(str_book->book_id!=x&&str_book->book_id!=0)
	{
		str_book++;
		count++;
	}
	if(str_book->book_id==0)
	{
		cout<<"对不起，没有此图书"<<endl;
	}
	else
	{
		while(str_book->book_id==0)
		{
			str_book[count]=str_book[count+1];
			count++;
			cout<<"删除成功"<<endl;
		}
	}
	Sleep(2000);
}

void add_member(Member *str_member)
{
	system("cls");
	while(str_member->ID==0)
	{
		str_member++;
	}
	cout<<"请输入会员ID："<<endl;
	cin>>str_member->ID;
	cout<<"增加成功"<<endl;
	Sleep(2000);
}

void serch_member(Member *str_member)
{
	system("cls");
	int y;
	cout<<"请输入查询会员号："<<endl;
	cin>>y;
	while(str_member->ID!=y&&str_member->ID!=0)
	{
		str_member++;
		cout<<str_member->ID<<endl;
	}
	if(str_member->ID==0)
	{
		cout<<"对不起，没有此会员"<<endl;
	}
	else
	{
		cout<<"会员ID为："<<str_member->ID<<endl;
		cout<<"会员所借图书册数为："<<str_member->borrow_number<<endl;
	}
	Sleep(2000);
}

void drop_member(Member *str_member)
{
	system("cls");
	int y,count=0;
	cout<<"请输入删除会员号："<<endl;
	cin>>y;
	while(str_member->ID==y&&str_member->ID==0)
	{
		str_member++;
		count++;
	}
	if(str_member->ID==0)
	{
		cout<<"对不起，没有此会员"<<endl;
	}
	else
	{
		while(str_member->ID==0)
		{
			str_member[count]=str_member[count+1];
			count++;
			cout<<"删除成功"<<endl;
		}
	}
	Sleep(2000);
}

void borrow_book(Book *str_book,Member *str_member)
{
	system("cls");
	while(str_member->borrow_number!=0)
	{
		cout<<'\t'<<setw(8)<<"会员ID"<<'\t'<<setw(8)<<"所借图书ID"<<'\t'<<setw(8)<<"借书期限"<<endl;
		cout<<'\t'<<setw(8)<<str_member->ID<<'\t'<<setw(8)<<str_member->borrow_book_id<<'\t'<<setw(8)<<str_member->time;
		str_member++;
	}
	Sleep(2000);
}

void put()
{
	system("cls");
	cout<<'\t'<<"********************欢迎进入图书馆借阅系统********************"<<endl;
	cout<<'\t'<<"********************  请选择所需要的功能  ********************"<<endl;
	cout<<'\t'<<"*****1 增加图书                               2 查询图书******"<<endl;
	cout<<'\t'<<"*****3 图书借阅                               4 归还图书******"<<endl;
	cout<<'\t'<<"*****5 删除图书                               6 增加会员******"<<endl;
	cout<<'\t'<<"*****7 查询会员                               8 删除会员******"<<endl;
	cout<<'\t'<<"*****9 借书信息                               0 退出系统******"<<endl;
	cout<<'\t'<<"*************************************************************"<<endl;
}
int main()
{

	int x=1;
	Member *str_member=new Member[10];
	Book *str_book=new Book[10];
	Index *str_index=new Index;
	while(x!=0)
	{
		put();
		cin>>x;
		switch(x)
	{
	case 1:add(str_book,str_index) ;break;
	case 2:serch(str_book); break;
	case 3:borrow(str_book,str_member); break;
	case 4:get(str_book,str_member); break;
	case 5:drop(str_book,str_index); break;
	case 6:add_member(str_member); break;
	case 7:serch_member(str_member);break;
	case 8:drop_member(str_member);break;
	case 9:borrow_book(str_book,str_member);break;
	}
	}
	return 0; 
}

但是，，有另外一个问题，就是为什么我的add函数赋值以后，其他函数在调用就没有值了

#2

插入算法错误，书被你插入到数组外部了

#3

LZ会单步跟踪，到关键步骤打印一下值不就找到错误所在了？

#4

void add_member(Member *str_member)
{
    system("cls");
    Member *s=str_member;
    while(s->ID==0)
    {
        s++;
    }
    cout<<"请输入会员ID："<<endl;
    cin>>s->ID;
    cout<<"增加成功"<<endl;
    Sleep(2000);
}

#5

程序也太长了。

#6

单步调试没问题，直接运行出错
有很大可能就是索引越界，前几步都正常，推进大了，代码逻辑出错，指针越界、数组越界都有可能