std::vector<RObject*>& RObject::children() { return m_children; }是什么意思
时间: 2023-05-31 08:05:34 浏览: 56
This is a declaration of a C++ vector of pointers to RObject objects. The std::vector container is a dynamic array that can be resized during runtime, while RObject is presumably a user-defined class or type. The asterisk (*) indicates that the vector stores pointers to RObject objects, rather than the objects themselves. This allows for more efficient memory management and can avoid unnecessary copying of objects.
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void DumpTreeNG(const RefPtr<NG::FrameNode>& parent, int32_t depth, NodeId nodeID, int32_t pageId) { auto node = GetInspectorById(parent, nodeID); if (!node) { return; } if (!node->IsActive()) { return; } NG::RectF rect = node->GetTransformRectRelativeToWindow(); DumpLog::GetInstance().AddDesc("ID: " + std::to_string(node->GetAccessibilityId())); DumpLog::GetInstance().AddDesc("compid: " + node->GetInspectorId().value_or("")); std::vector<int32_t> children; for (const auto& item : node->GetChildren()) { GetFrameNodeChildren(item, children, pageId); } DumpLog::GetInstance().Print(depth, node->GetTag(), children.size()); for (auto nodeId : children) { DumpTreeNG(node, depth + 1, nodeId, pageId); } }改写此段代码,将父节点和子节点打印出的信息全部放在一个vector<ComponentInfo> com1容器中,ComponentInfo是一个struct其中的成员变量是 ComponentInfo{ std::string ID; std::string text; std::vector<ComponentInfo> children;}
void DumpTreeNG(const RefPtr<NG::FrameNode>& parent, int32_t depth, NodeId nodeID, int32_t pageId, std::vector<ComponentInfo>& com1) {
auto node = GetInspectorById(parent, nodeID);
if (!node) {
return;
}
if (!node->IsActive()) {
return;
}
NG::RectF rect = node->GetTransformRectRelativeToWindow();
ComponentInfo info;
info.ID = std::to_string(node->GetAccessibilityId());
info.text = node->GetTag();
info.children = std::vector<ComponentInfo>();
for (const auto& item : node->GetChildren()) {
std::vector<int32_t> children;
GetFrameNodeChildren(item, children, pageId);
for (auto nodeId : children) {
ComponentInfo childInfo;
DumpTreeNG(item, depth + 1, nodeId, pageId, childInfo.children);
info.children.push_back(childInfo);
}
}
com1.push_back(info);
}
用C++编写一程序,模拟一个简单的文件管理系统。树型结构,目录下可以是目录,也可以是文件。 在此文件管理系统,可实现的操作有: 改变目录(可以回到根目录):格式:cd <目录名> 显示目录:格式:dir<目录名> 创建目录:格式:md <目录名> 删除目录:格式:rd<目录名> 新建文件:格式:edit<文件名> 删除文件:格式:del<文件名> 退出文件系统:exit
以下是一个简单的文件管理系统的实现,使用了C++的面向对象编程思想,采用树型结构存储目录与文件信息:
```
#include <iostream>
#include <string>
#include <vector>
using namespace std;
class Node {
public:
string name;
bool isFile;
vector<Node*> children;
Node(string n, bool f) {
name = n;
isFile = f;
}
};
class FileSystem {
private:
Node* root;
Node* current;
public:
FileSystem() {
root = new Node("", false);
current = root;
}
void run() {
cout << "Simple File System\n";
string command;
while (true) {
cout << ">>";
cin >> command;
if (command == "cd") {
string name;
cin >> name;
changeDirectory(name);
}
else if (command == "dir") {
string name;
cin >> name;
displayDirectory(name);
}
else if (command == "md") {
string name;
cin >> name;
createDirectory(name);
}
else if (command == "rd") {
string name;
cin >> name;
deleteDirectory(name);
}
else if (command == "edit") {
string name;
cin >> name;
createFile(name);
}
else if (command == "del") {
string name;
cin >> name;
deleteFile(name);
}
else if (command == "exit") {
exit(0);
}
else {
cout << "Invalid command.\n";
}
}
}
void changeDirectory(string name) {
if (name == "") {
current = root;
return;
}
for (Node* child : current->children) {
if (child->name == name && !child->isFile) {
current = child;
return;
}
}
cout << "Directory not found.\n";
}
void displayDirectory(string name) {
if (name == "") {
name = current->name;
}
for (Node* child : current->children) {
if (child->name == name) {
if (!child->isFile) {
cout << "Directory: " << child->name << "\n";
for (Node* subchild : child->children) {
if (subchild->isFile) {
cout << "File: " << subchild->name << "\n";
}
else {
cout << "Directory: " << subchild->name << "\n";
}
}
}
else {
cout << "File: " << child->name << "\n";
}
return;
}
}
cout << "Directory not found.\n";
}
void createDirectory(string name) {
for (Node* child : current->children) {
if (child->name == name && !child->isFile) {
cout << "Directory already exists.\n";
return;
}
}
Node* newDirectory = new Node(name, false);
current->children.push_back(newDirectory);
}
void deleteDirectory(string name) {
for (int i = 0; i < current->children.size(); i++) {
Node* child = current->children[i];
if (child->name == name && !child->isFile) {
current->children.erase(current->children.begin() + i);
delete child;
return;
}
}
cout << "Directory not found.\n";
}
void createFile(string name) {
for (Node* child : current->children) {
if (child->name == name && child->isFile) {
cout << "File already exists.\n";
return;
}
}
Node* newFile = new Node(name, true);
current->children.push_back(newFile);
}
void deleteFile(string name) {
for (int i = 0; i < current->children.size(); i++) {
Node* child = current->children[i];
if (child->name == name && child->isFile) {
current->children.erase(current->children.begin() + i);
delete child;
return;
}
}
cout << "File not found.\n";
}
};
int main() {
FileSystem fs;
fs.run();
return 0;
}
```
该程序实现了用户可以进入不同目录、创建、显示和删除目录与文件等基本功能,用户可以通过输入不同的命令来操作文件系统。