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
其实,string并不是一个单独的容器,只是basic_string 模板类的一个typedef 而已,相对应的还有wstring, 你在string 头文件中你会发现下面的代码: extern"C++"{typedefbasic_string <char> string;typedefbasic_string <wchar_t> wstring; }// extern "C++" 由于只是解释string的用法,如果没有特殊的说明,本文并不...
#include <iostream> using namespace std; union u { char c; int n; }; int main() { cout << sizeof(u) << endl; return 0; } 运行结果为4,实际上上面代码定义的union就是两个变量共用同一块内存。union的大小为最大的那一个变量。 它与结构体struct的不同就是struct需要满足内存对齐,例如下面...
std::string body; auto res = cli.Get("/large-data", [&](const char *data, size_t data_length) { body.append(data, data_length); return true; }); std::string body; auto res = cli.Get( "/stream", Headers(), [&](const Response &response) { EXPECT_EQ(StatusCode::OK_200,...
*/ void chatterCallback(const std_msgs::String::ConstPtr& msg) { ROS_INFO("I heard: [%s]", msg->data.c_str()); } int main(int argc, char **argv) { /** * The ros::init() function needs to see argc and argv so that it can perform * any ROS arguments and name remapping...
std::string body;autores = cli.Get("/large-data", [&](constchar*data,uint64_tdata_length,uint64_toffset,uint64_tcontent_length) { body.append(data, data_length); });assert(res->body.empty()); httplib::Params params; params.emplace("name","john"); params.emplace("note","coder"...
#include <msgpack.hpp> #include <string> #include <iostream> #include <sstream> int main() { msgpack::type::tuple<int, bool, std::string> src(1, true, "example"); // serialize the object into the buffer. // any classes that implements write(const char*,size_t) can be a buffer...
master tetanus dev cleanup/printf-z cleanup/suggest-braces someara cleanup/readdir_r someara-rpi sso-update dev-multithread-io honda-dev central-controller windows-route-metrics root 1.10.2 1.10.1 1.10.0 1.8.10 1.8.9 1.8.8 1.8.7 1.8.6 1.8.5 1.8.4 1.8.3 1.8.2 1.8.1 1.6.6-fixed-...
at System.Text.UTF8Encoding.GetByteCount (System.Char* chars, Int32 count) [0x00000] in <filename unknown>:0 at System.Text.Encoding.GetByteCount (System.String s) [0x00000] in <filename unknown>:0 at System.Text.UTF8Encoding.GetByteCount (System.String chars) [0x00000] in <filename unk...
Insertion or removal of elements at the end - amortized constant𝓞(1). Insertion or removal of elements - linear in the distance to the end of the vector𝓞(n). std::vector(forTother thanbool) meets the requirements ofContainer,AllocatorAwareContainer(since C++11),SequenceContainer,Contiguous...