Reorder initializers to match the runtime order.
时间: 2023-12-26 14:20:55 浏览: 139
对于调整初始化程序以匹配运行时顺序的问题,您可以按照以下步骤进行操作:
1. 确定运行时顺序:了解程序在运行时期望的初始化顺序。这可能涉及到对象依赖关系,资源分配或其他相关因素。
2. 检查初始化程序:检查现有的初始化程序,了解它们的顺序。
3. 重排序初始化程序:根据运行时顺序的要求重新排列初始化程序。这可能需要修改代码或重新组织初始化代码的结构。
4. 测试和验证:在进行任何更改后,进行测试和验证以确保程序在重新排序后仍然正确运行。
相关问题
根据这些信息提供创建数据库和创建数据表的Oracle代码:CUSTOMER: stores customer information such as name, address, phone number, email, and loyalty program status. This table has the primary key of CustomerID. • ORDER: stores information about each order such as the order date, order status, and total cost. This table has a primary key of OrderID and a foreign key to the Customer table. • ORDER_DETAILS: stores details about each item in an order such as the product name, price, quantity, and subtotal. This table has a primary key of OrderDetailID and foreign keys to the Order and PRODUCT tables. • PRODUCT: stores information about each product such as the product name, description, price, and category. This table has the primary key of ProductID. • STORE: stores information about each store such as the store name, location, and hours of operation. This table has the primary key of StoreID. • INVENTORY: stores information about the inventory for each product in each store such as the quantity on hand and the reorder point. This table has a composite primary key of ProductID and StoreID. Group Assignment • TRANSACTION: stores information about each transaction such as the transaction date, transaction type, and total amount. This table has a primary key of TransactionID and a foreign key to the Customer table. • TRANSACTION_DETAILS: stores details about each item in a transaction such as the product name, price, quantity, and subtotal. This table has the primary key of TransactionDetailID and foreign keys to the TRANSACTION and PRODUCT tables. • EMPLOYEE: stores employee information such as name, address, phone number, email, and position. This table has the primary key of EmployeeID. • SALARY: stores information about the salary for each employee such as the salary amount, start date, and end date. This table has a composite primary key of EmployeeID and StartDate. • SHIFT: stores information about the shift for each employee such as the start time, end time, and store location. This table has a primary key of ShiftID and foreign keys to the Employee and STORE tables.
以下是创建数据库和创建数据表的Oracle代码:
创建数据库:
```
CREATE DATABASE myDatabase;
```
创建数据表:
```
CREATE TABLE CUSTOMER (
CustomerID INT PRIMARY KEY,
Name VARCHAR(50),
Address VARCHAR(100),
Phone VARCHAR(20),
Email VARCHAR(50),
LoyaltyProgramStatus VARCHAR(20)
);
CREATE TABLE ORDER (
OrderID INT PRIMARY KEY,
OrderDate DATE,
OrderStatus VARCHAR(20),
TotalCost DECIMAL(10, 2),
CustomerID INT FOREIGN KEY REFERENCES CUSTOMER(CustomerID)
);
CREATE TABLE ORDER_DETAILS (
OrderDetailID INT PRIMARY KEY,
ProductName VARCHAR(50),
Price DECIMAL(10, 2),
Quantity INT,
Subtotal DECIMAL(10, 2),
OrderID INT FOREIGN KEY REFERENCES ORDER(OrderID),
ProductID INT FOREIGN KEY REFERENCES PRODUCT(ProductID)
);
CREATE TABLE PRODUCT (
ProductID INT PRIMARY KEY,
ProductName VARCHAR(50),
Description VARCHAR(100),
Price DECIMAL(10, 2),
Category VARCHAR(50)
);
CREATE TABLE STORE (
StoreID INT PRIMARY KEY,
StoreName VARCHAR(50),
Location VARCHAR(100),
HoursOfOperation VARCHAR(50)
);
CREATE TABLE INVENTORY (
ProductID INT,
StoreID INT,
QuantityOnHand INT,
ReorderPoint INT,
PRIMARY KEY (ProductID, StoreID),
FOREIGN KEY (ProductID) REFERENCES PRODUCT(ProductID),
FOREIGN KEY (StoreID) REFERENCES STORE(StoreID)
);
CREATE TABLE TRANSACTION (
TransactionID INT PRIMARY KEY,
TransactionDate DATE,
TransactionType VARCHAR(20),
TotalAmount DECIMAL(10, 2),
CustomerID INT FOREIGN KEY REFERENCES CUSTOMER(CustomerID)
);
CREATE TABLE TRANSACTION_DETAILS (
TransactionDetailID INT PRIMARY KEY,
ProductName VARCHAR(50),
Price DECIMAL(10, 2),
Quantity INT,
Subtotal DECIMAL(10, 2),
TransactionID INT FOREIGN KEY REFERENCES TRANSACTION(TransactionID),
ProductID INT FOREIGN KEY REFERENCES PRODUCT(ProductID)
);
CREATE TABLE EMPLOYEE (
EmployeeID INT PRIMARY KEY,
Name VARCHAR(50),
Address VARCHAR(100),
Phone VARCHAR(20),
Email VARCHAR(50),
Position VARCHAR(50)
);
CREATE TABLE SALARY (
EmployeeID INT,
StartDate DATE,
EndDate DATE,
SalaryAmount DECIMAL(10, 2),
PRIMARY KEY (EmployeeID, StartDate),
FOREIGN KEY (EmployeeID) REFERENCES EMPLOYEE(EmployeeID)
);
CREATE TABLE SHIFT (
ShiftID INT PRIMARY KEY,
StartTime TIME,
EndTime TIME,
StoreID INT FOREIGN KEY REFERENCES STORE(StoreID),
EmployeeID INT FOREIGN KEY REFERENCES EMPLOYEE(EmployeeID)
);
```
As a second example, the goal is to write inline assembler code, that takes a string as input, and calculates the length of the string. Recall that strings in C are represented as arrays of char and each char has a size of 1 byte. Make sure to use the correct assembler-load instruction to get the next character. Strings are terminated by the \0 (the value 0, not the symbol 0), which doesn’t count as part of the string. To test the result, you can compare it with the result of the libc function strlen or with the C function presented in an earlier class.
Here's an example of inline assembler code that calculates the length of a string:
```c
#include <stdio.h>
int main() {
char str[] = "Hello, world!";
int len;
asm volatile (
"movl $0, %0\n\t" // initialize counter to 0
"1:\n\t"
"movb (%1), %%al\n\t" // load next character into al
"cmpb $0, %%al\n\t" // compare with null terminator
"je 2f\n\t" // if equal, jump to end
"incl %0\n\t" // increment counter
"incl %1\n\t" // increment pointer
"jmp 1b\n\t" // jump to beginning of loop
"2:\n\t"
: "=r" (len) // output: len = counter
: "r" (str) // input: str = pointer to string
: "%eax" // clobbered register: eax
);
printf("Length of string: %d\n", len);
return 0;
}
```
Explanation:
- The `asm volatile` statement tells the compiler that this is inline assembler code that may modify registers and memory, and that it should not optimize or reorder instructions.
- The `movl $0, %0` initializes the counter to 0 and assigns it to the output variable `len`.
- The label `1:` marks the beginning of a loop that processes each character of the string.
- The `movb (%1), %%al` instruction loads the next character into the `al` register.
- The `cmpb $0, %%al` instruction compares the character with the null terminator.
- The `je 2f` instruction jumps to the label `2:` if the character is a null terminator.
- The `incl %0` instruction increments the counter.
- The `incl %1` instruction increments the pointer to the next character.
- The `jmp 1b` instruction jumps back to the beginning of the loop.
- The label `2:` marks the end of the loop.
- The output operand `=r` (len) tells the compiler that `len` is an output variable that will be stored in a register.
- The input operand `"r" (str)` tells the compiler that `str` is an input variable that will be stored in a register.
- The clobbered register `%eax` tells the compiler that the `eax` register may be modified by the inline assembler code.
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