vector<int>v={3,1,4,1,5,9};for(autoiter=v.begin();iter!=v.end();++iter)std::cout<<*iter<<' ';std::cout<<"\n\n""5) init-statement can be an expression:\n";intn=0;for(std::cout<<"Loop start\n";std::cout<<"Loop test\n";std::cout<<"Iteration "<<++n<<'\n'...
它编译得很好,但它只返回向量中第一项的值:mywhich(samplevector, samplevector[1])返回值,mywhich(samplevector, samplevector[2])函数的代码如下所示,它只需要在数字和整数向量上运行using namespace Rcpp; //[[
范围for循环(Range-based for loop) C++20引入了范围for循环的功能,可以方便地遍历容器(如向量、列表、集合等)和数组。 以下是一个示例,演示如何使用范围for循环: c复制代码 #include <iostream> #include <vector> int main() { std::vector<int> numbers = {1, 2, 3, 4, 5}; // 使用范围for循环遍...
// argument vector napi_value argv[ARG_1] = { 0 }; napi_value thisVar = nullptr; void *data = nullptr; napi_status status = napi_get_cb_info(env, info, &argc, argv, &thisVar,&data); NAPI_ASSERT(env, status == napi_ok, "Bad parameters"); NAPI_ASSERT(env, argc == expectAr...
There is tricky thing for deleting in vector loop. The erase method returns the next element after the one you just erased. So you can use that to continue in your loop. vector c; iterator i = c.begin(); while(i != c.end()){ ...
__cpp_range_based_for200907L(C++11)Range-basedforloop 201603L(C++17)Range-basedforloop withdifferentbegin/endtypes 202211L(C++23)Lifetime extension for all temporary objects inrange-initializer Keywords for Example Run this code #include <iostream>#include <vector>intmain(){std::vector<int>...
std::vector<int> v = {1, 2, 3, 4, 5}; // 使用范围for循环遍历向量并输出 for (const auto &elem : v) { std::cout << elem << " "; } std::cout << std::endl; return 0; } 输出结果为: 复制代码 1 2 3 4 5 除了向量,初始化列表还可以用于初始化其他类型,如结构体、联合体等...
for(size_ti=0;i<(Degree+1);++i) { ans += m_coefficientArr[i]*pow((double)x,(int)i); } returnans; } /// /// \brief 计算均值 /// \return 均值 /// template<typenameT> staticT Mean(conststd::vector<T>& v) { returnMean(&v[0],v.size()); ...
vector<KeyFrame::Ptr> keyframes; std::unordered_map<ros::Time, KeyFrame::Ptr, RosTimeHash> keyframe_hash; std::unique_ptr<GraphSLAM> graph_slam; std::unique_ptr<LoopDetector> loop_detector; std::unique_ptr<KeyframeUpdater> keyframe_updater; std::unique_ptr<NmeaSentenceParser> nmea_...
n-1){lft=v;rgt=v}(funt->sumcountt)letpow2n=loopn()(fun_->1)