pos);//pos为string元素的下标,范围是从pos开始的字符串stringstr1(str2, pos, len);stringstr1(str2, iter);//iter为string类型的迭代器,类似于vector<char>类型的迭代器,范围是从iter开始的字符串stringstr1(str2, iter1, iter
C类型和C++的string类型都可以直接添加 添加数组和对象 //添加对象,可以再创建一个node添加或者直接{}node["nodeself"]=node; node["obj"]={ {"status","ok"}, {"vector",vector<string>()={"chenxuan","is","winner"}} };//C 类型数组constchar* oldStr[]={"asdf","nkjn"};autoarrOld=json...
error_message() << std::endl; return 0; } } private: std::unique_ptr<TestServer::Stub> stub_; }; int main(int argc, char** argv) { GreeterClient greeter(grpc::CreateChannel("127.0.0.1:5000", grpc::InsecureChannelCredentials())); std::string user("world"); int reply = greeter....
static char arr[]="hello,world/n"; "hello,world/n"存放在静态存储区(与全局变量相同),也不受函数返回的影响。 2.3错误返回局部指针的情形:返回执行局部对象的指针 char* retArr(void) {chararr[]="hello,world/n";//或static char arr[]="hello,world/n";returnarr; } char arr[]="hello,world/...
master edge v1-multicast-faster-send-timeout dev 1.4.6 1.4.4 1.4.2 1.4.0.1-2 1.4.0.1 1.4.0 v1.1.5-live-roots 1.2.12 1.2.10 1.2.8 1.2.6 cust-ixia 1.2.4 1.2.2 1.2.0 1.1.17-pre1.2.0 1.1.14 1.1.12 1.1.10 1.1.8 ZeroTierOne / selftest.cpp selftest.cpp 115.45 KB ...
std::string str = "foobar"; str.starts_with("foo"); // true str.ends_with("baz"); // false Check if associative container has element Associative containers such as sets and maps have a contains member function, which can be used instead of the "find and check end of iterator" idio...
(const 后面是 p3,说明 p3 指针自身不可改变) const char* const p4 = greeting; // 自身是常量的指针,指向字符数组常量 } // 函数 void function1(const int Var); // 传递过来的参数在函数内不可变 void function2(const char* Var); // 参数指针所指内容为常量 void function3(char* const Var);...
void* il2cpp::vm::MetadataLoader::LoadMetadataFile(const char* fileName) { std::string resourcesDirectory = utils::PathUtils::Combine(utils::Runtime::GetDataDir(), utils::StringView<char>("Metadata")); std::string resourceFilePath = utils::PathUtils::Combine(resourcesDirectory, utils::Stri...
*/voidchatterCallback(conststd_msgs::String::ConstPtr&msg){ROS_INFO("I heard: [%s]",msg->data.c_str());}intmain(int argc,char**argv){/** * The ros::init() function needs to see argc and argv so that it can perform
(conststd::string&key,double&d)const;boolgetParam(conststd::string&key,int&i)const;// 给参数赋值// 给key对应的val赋值,重载了多个类型的valvoidsetParam(conststd::string&key,conststd::string&s)const;voidsetParam(conststd::string&key,constchar*s)const;voidsetParam(conststd::string&key,inti...