class NUMBER_DETECTION { public: int init(const char* modeltype, int num_threads); int detect(const cv::Mat& rgb, std::vector<Object>& objects, float prob_threshold = 0.5f, float nms_threshold = 0.45f); void load_model(const cv::Mat& rgb, std::vector<Object>& objects); int destroy() { return 0; } private: void generate_proposals(const ncnn::Mat& anchors, int stride, const ncnn::Mat& in_pad, const ncnn::Mat& feat_blob, float prob_threshold, std::vector<Object>& objects); private: ncnn::Net yolov7; int num_threads = 4; float norm_vals[3] = { 1 / 255.f, 1 / 255.f, 1 / 255.f }; //�� float anchors0[6] = { 12.f,16.f, 19.f,36.f, 40.f,28.f }; float anchors1[6] = { 36.f,75.f, 76.f,55.f, 72.f,146.f }; float anchors2[6] = { 142.f,110.f, 192.f,243.f, 459.f,401.f }; /*float anchors0[6] = { 4.f,5.f, 6.f,8.f, 10.f,12.f }; float anchors1[6] = { 15.f,19.f, 23.f,30.f, 39.f,52.f }; float anchors2[6] = { 72.f,97.f, 123.f,164.f, 209.f,297.f };*/ };

阅读程序，写结果 #include<iostream> using namespace std; class A{ public : A(const char s) { cout<<s<<endl; }~AO {} class B : virtual public A{ public: B(const char s1, const char s2): A(s1){ cout<<s2<< endl; } class C:virtual public A{ public : C(const char s1.constchars2):A(s1){cout<<s2<<endl; class D: public B.public C{ public : D( const char s1,const chars2,constchar s3,constchar s4): B( s1, s2),C(s1, s3 ), A( s1 ){ cout<<s4<<endl; }}; int main { D ptr = new D( "class A", "class B", "class C", "class D" ); delete ptr;

该程序包含一个类 A，一个类 B 继承自 A，一个类 C 继承自 A，以及一个类 D 同时继承自 B 和 C。在 main 函数中，创建了一个 D 类的对象指针 ptr，并传入了一些字符串参数，在对象创建时输出这些字符串，最后...class D

class Country { private: char name[40],capital[40]; int population; public: Country( const char* cou=NULL,const char* cap="NONE",int pop=0 ); const char* GetName const ( ); const char* GetCapital const ( ); int GetPopulation const ( ); void Set( const char* cou="Russia",const char* cap="Moscow",int pop=143000000 ); void Show(); }; Country::Country( const char* cou,const char* cap,int pop ) { strcpy(name,cou); strcpy(capital,cap); population=pop; } const char* Country::GetName const( ) { return name; } const char* Country::GetCapital const( ) { return capital; } int Country::GetPopulation const( ) { return population; } void Country::Set( const char* cou,const char* cap,int pop ) { strcpy(name,cou); strcpy(capital,cap); population=pop; } void Country::Show( ) { cout<<name<<"-"<<capital<<"-"<<population<<endl; } 有何问题

Country(const char* cou = NULL, const char* cap = "NONE", int pop = 0); const char* GetName() const; const char* GetCapital() const; int GetPopulation() const; void Set(const char* cou = "Russia...

class Country { private: char name[40],capital[40]; int population; public: Country( const char* cou=NULL,const char* cap="NONE",int pop=0 ); char* GetName const( ); char* GetCapital const( ); int GetPopulation const( ); void Set( const char* cou="Russia",const char* cap="Moscow",int pop=143000000 ); void Show(); }; Country::Country( const char* cou,const char* cap,int pop ) { strcpy(name,cou); strcpy(capital,cap); population=pop; } char* Country::GetName const( ) { return name; } char* Country::GetCapital const( ) { return capital; } int Country::GetPopulation const( ) { return population; } void Country::Set( const char* cou,const char* cap,int pop ) { strcpy(name,cou); strcpy(capital,cap); population=pop; } void Country::Show( ) { cout<<name<<"-"<<capital<<"-"<<population<<endl; } 这段代码有什么问题

Country(const char* cou = NULL, const char* cap = "NONE", int pop = 0); const char* GetName() const; const char* GetCapital() const; int GetPopulation() const; void Set(const char* cou = "Russia...

class Country { private: char name[40],capital[40]; int population; public: Country( const char* cou=NULL,const char* cap=NONE,int pop=0 ); char GetName const( ); char GetCapital const( ); int GetPopulation const( ); void Set( const char* cou=Russia,const char* cap=Moscow,int pop=143000000 ); void Show(); }; Country::Country( const char* cou,const char* cap,int pop ) { strcpy(name,cou); strcpy(capital,cap); population=pop; } char Country::GetName const( ) { return name; } char Country::GetCapital const( ) { return capital; } int Country::GetPopulation const( ) { return population; } void Country::Set( const char* cou,const char* cap,int pop ) { strcpy(name,cou); strcpy(capital,cap); population=pop; } void Country::Show( ) { cout<<name<<"-"<<capital<<"-"<<population<<endl; }

函数 GetName、GetCapital 和 GetPopulation 分别用于获取对象的国家名称、首都和人口数量，它们没有参数，返回一个 char 型的值，表示对应的成员变量。函数 Set 用于设置对象的国家名称、首都和人口数量，它接受...

msys2 编译pulseaudio 错误 error: conflicting types for 'inet_ntop'; have 'const char (int, cons t void , char , socklen_t)' {aka 'const char (int, const void , char , int)'} 36 | const char inet_ntop(int af, const void src, char *dst, socklen_t cnt) {

这是一个类型冲突（type conflict）错误，可能是由于头文件包含次序不正确或者使用了不兼容的库版本等原因引起的。建议您检查一下相关的头文件和库文件，确保它们都是最新的版本，并且符合编译器的要求。此外，您也...

class EncodingDefs { public: static const int RAW = 0; static const int COPYRECT = 1; static const int RRE = 2; static const int HEXTILE = 5; static const int TIGHT = 7; static const int ZRLE = 16; static const char const SIG_RAW; static const char const SIG_COPYRECT; static const char const SIG_RRE; static const char const SIG_HEXTILE; static const char const SIG_TIGHT; static const char const SIG_ZRLE; };

这是一个 C++ 类 EncodingDefs，它定义了一些常量和字符串常量，用于表示远程桌面协议中的编码类型。其中，常量 RAW、COPYRECT、RRE、HEXTILE、TIGHT 和 ZRLE 分别表示编码类型的编号。这些常量的值是固定的，不能...

#define _CRT_SECURE_NO_WARNINGS #include<iostream> #include<string> #include<string.h> using namespace std; class student { private: long num; char* name; string major; char Class[4]; public: student(const char* nam); void show_stu(); }; student::student(const char* nam) { name = new char[strlen(nam) + 1]; strcpy(name, nam); cout << "分别输入学号和姓名: " << endl; cin >> num; cin >> name; cout << "输入专业:" << endl; cin >> major; cout << "输入班级:" << endl; cin >> Class[4]; } void student::show_stu() { cout << "学生信息： " << num << " " << name << endl; cout << " " << major << " " << Class[4] << endl; } class leader:public student { private: string position; public: leader(const char* na) :student(na); }; leader::leader(const char* na) { cout << "输入职位:" << endl; cin >> positon; } int main() { student a("fakeeeeee"); a.show_stu(); leader b("fakeeeeee"); return 0; }帮我找出上面c++代码的bug

3. 在 leader 类中，构造函数的声明应该为 leader(const char* na) :student(na) {}，而不是 leader(const char* na) :student(na);。 4. 在 leader 类中，cin >> positon 应该改为 cin >> position。 ...

request for member 'toInt' in 'msg.std_msgs::String::data', which is of non-class type 'const _data_type {aka const char* const}'

这个错误提示是因为你试图在一个 std_msgs::String 类型的变量 msg 的 data 成员上调用 toInt 函数，但是 data 成员是一个 const char* 类型的指针，它并不是一个类类型，所以不能直接调用类成员函数 ...

153 36 C:\Users\guozihang\Desktop\os\1.cpp [Error] invalid cast from type 'const value_type {aka const std::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char> > >}' to type 'int'

这个错误通常发生在你试图将一个不同类型的对象转换成 int 类型时。从错误信息来看，可能是在使用正则表达式时出现问题。请检查你的代码，特别是使用正则表达式的部分，看看是否有将 std::sub_match 对象转换...

ros::init(int&, char**, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int)'

这个错误可能是由于ROS版本不兼容导致的。ROS版本之间可能会有一些差异，例如函数参数的类型...另外，你也可以尝试在初始化ROS时使用默认参数ROS::init(argc, argv, "node_name")，这样可以避免一些版本不兼容的问题。

#include<iostream> #include<cstring> using namespace std; class Country { private: char name[40],capital[40]; int population; public: Country( const char* cou=NULL,const char* cap="NONE",int pop=0 ); const char* GetName ( ) const; const char* GetCapital ( ) const; int GetPopulation ( ) const ; void Set( const char* cou="Russia",const char* cap="Moscow",int pop=143000000 ); void Show(); }; Country::Country( const char* cou,const char* cap,int pop ) { strcpy(name,cou); strcpy(capital,cap); population=pop; } const char* Country::GetName ( ) const { return name; } const char* Country::GetCapital ( ) const { return capital; } int Country::GetPopulation ( ) const { return population; } void Country::Set( const char* cou,const char* cap,int pop ) { strcpy(name,cou); strcpy(capital,cap); population=pop; } void Country::Show( ) { cout<<name<<"-"<<capital<<"-"<>name>>capital>>population; Country c2(name,capital,population); cout<<"Show object c2:"; cout<<c2.GetName()<<"-"<<c2.GetCapital()<<"-"<<c2.GetPopulation()<<endl; cin>>name>>capital>>population; cout<<"Reset and Show object c1:"; c1.Set(name,capital,population); c1.Show(); cout<<"Reset and Show object c2:"; c2.Set(); c2.Show(); return 0; }改进代码，不要修改主函数

Country(const string& cou = "Russia", const string& cap = "Moscow", int pop = 143000000); const string& GetName() const; const string& GetCapital() const; int GetPopulation() const; void Set...

class myTest { public: myTest (const char str, int num); myTest (const myTest &m); ~ myTest (void); //destructor friend ostream & operator<<(ostream& out, const myTest &m); //operator overloading private: char m_data; int n; }; Please write the constructor, copy constructor, the destructor, and the operator overloading:

myTest(const char *str, int num) { m_data = new char[strlen(str) + 1]; strcpy(m_data, str); n = num; } myTest(const myTest &m) { m_data = new char[strlen(m.m_data) + 1]; strcpy(m_data, m.m_...

找出下列代码的错误并加以解释：class Test{ private: int num; char * testtr; public: Test(); void writetest(int ipnum = 22, const char * ipstr = "aaaabbbb"); } Test::Test(){ num = 0; testtr[0] = 'a'; testtr[1] = 'b'; } void Test::writetest(int ipnum = 22, const char * ipstr="aaaabbbb"){ num = ipnum; strcpy(testtr, ipstr); }

void writetest(int ipnum = 22, const char * ipstr = "aaaabbbb"); }; Test::Test(){ num = 0; testtr = new char[10]; testtr[0] = 'a'; testtr[1] = 'b'; } void Test::writetest(int ipnum, const char ...

qt中调用以下Interface_CppDllMingW.h定义的C++动态dll库，在qi中直接引入以下代码的Interface_CppDllMingW.h提示语法错误，给出在qt中引入的Interface_C'p'p'DllMingW.h的代码；#pragma once #ifdef INTERFACE_CPPDLLMINGW_EXPORTS #define INTERFACE_CPPDLLMINGW_API extern "C" __declspec(dllexport) #else #define INTERFACE_CPPDLLMINGW_API extern "C" __declspec(dllimport) #endif public ref class Interface_CppDllMingW { public: // Interface_CppDllMingW() = default; // ~Interface_CppDllMingW() = default; virtual int mingw_add(int a, int b) = 0; virtual void mingw_substract(int a, int b, int* c) = 0; virtual void mingw_showBox(const char* str) = 0; virtual short win32_Sync_isUSBExist() =0; virtual short win32_Sync_READ_status(const char* MainProg, const char* CurProg, int* CurSeq, const char* Mode, const char* Status, const char* Alarm, const char* EMG) = 0; }; INTERFACE_CPPDLLMINGW_API Interface_CppDllMingW^ CALL_API();

由于中文输入法出现了误差，Interface_CppDllMingW.h 库的名称中出现了额外的字母 ‘p’。在qt中，正确引入该库的方式如下： #include "Interface_CppDllMinGW.h

class ClassImpl { public: virtual void testRangeBasedFor() { std::vector<int> vec = { 1, 2, 3, 4, 5 }; for (auto item : vec) { [&]() { std::cout << item << std::endl; }; } } }; class Test1 : public ClassImpl { public: void test(const char* data) { std::cout << "test1" << std::endl; } }; typedef std::vector<void(ClassImpl::)(const char)> CImpl; int main(int argc, char* argv[]) { CImpl vec_impl; vec_impl.push_back(&Test1::test); return 0; }

typedef void (ClassImpl::*MemberFuncPtr)(const char*); int main(int argc, char* argv[]) { std::vector<MemberFuncPtr> vec_impl; vec_impl.push_back(&Test1::test); // 使用示例：调用 vec_impl 中的...

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