Regular Expression Iterator

標題：使用迭代器匹配字串
VC++ (regex.cpp)：

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#include <iostream> #include <regex> //string lib here using namespace std; int main(int argc, char* argv[]) { string str = "facet normal -8.944272e-001 4.472136e-001 0.000000e+000"; regex pattern("[+-]?[0-9]\\.[0-9]+[eE][+-]?[0-9]+"); auto words_begin = sregex_iterator(str.begin(), str.end(), pattern); auto words_end = sregex_iterator(); cout << "Found " << std::distance(words_begin, words_end) << " numbers:\n"; for (sregex_iterator i = words_begin; i != words_end; ++i) { cout << atof( ((smatch) *i).str().c_str() ) << '\n'; } system("pause"); return 0; }

說明：
使用迭代器匹配字串。