vector<int>::iterator result = find( L.begin( ), L.end( ), 3 ); //查找3 if ( result == L.end( ) ) //没找到 cout << "No" << endl; else //找到 cout << "Yes" << endl; } 记着要包含algorithm这一头文件,其定义了find这一函数。 资料参考:https://www.coonote.com/cplusplu...
vector<int>vec; vec.push_back(123); vec.push_back(456); vector<int>::iterator findit=find(vec.begin(),vec.end(),123); //vector<int>::iterator findit = find(vec.begin(),vec.end(),111); if(findit==vec.end()) { printf("no find\n"); } else { printf("find[%d]\n",*fi...
In this program, a vector is declared with no elements, and on executing the code, the size of the vector will be displayed as 0. Example #5 CPP program that declares a vector add elements and print size Code: #include <iostream> #include <vector> using namespace std; //main method ...
cout<<c<<" ";// Printing the original elements of the vectorvector<string>result=test(colors);// Calling the test function to find strings containing digitscout<<"\n\nFind strings that contain a number(s) from the said vector:\n";for(string c:result)cout<<c<<" ";// Printing the ...
STL_string.vector中find到的iterator的序号 ZC:注意,printf("0x%08X\n",vtr.end()); 打印出来 应该就是 0x00000000,∵ 它就是 指向最后一个元素的后面,应该是理解成 无意义 值是0 很合理。 1、测试代码(以及 我的疑问) /*ZC: 网上查到,使用vector时,只要将 find到的iterator(itX)减去vector::begin()...
// [[Rcpp::export(rng = false)]] Eigen::SparseMatrix<double> ComputeSNN(Eigen::MatrixXd nn_ranked, double prune) { std::vector<T> tripletList; //声明一个向量 int k = nn_ranked.cols(); //总列数 tripletList.reserve(nn_ranked.rows() * nn_ranked.cols()); //定义行列,初始化全0...
arrow/cpp/build on main [!?] via △ v3.27.9took 4s ❯ cd ../../python arrow/python on main [!?] via △ v3.27.9 via 🐍 v3.8.10 ❯ export PYARROW_WITH_PARQUET=1 ❯ export PYARROW_WITH_DATASET=1 ❯ export PYARROW_PARALLEL=4 ❯ export PYARROW_WITH_PARQUET_ENCRYPTION=1 ...
=haystack.end())std::cout<<"haystack contains an even number "<<*it<<'\n';elsestd::cout<<"haystack does not contain even numbers\n";}}voidexample_list_init(){std::vector<std::complex<double>>haystack{{4.0,2.0}};#ifdef __cpp_lib_algorithm_default_value_type// T gets deduced ...
Constant on average, worst case linear in the size of the container. Notes Feature-testmacroValueStdFeature __cpp_lib_generic_unordered_lookup201811L(C++20)Heterogeneous comparison lookup inunordered associative containers; overloads(3,4)
std::vector<int>v={2,1,3,6,7,9,8}; intmin=findMinimum(v); intmax=findMaximum(v); std::cout<<min<<", "<<max<<std::endl;// 1, 9 return0; } DownloadRun Code That’s all about finding the min or max value in a vector in C++. ...