Linux c++ string转其他类型

#include <iostream> #include <sstream> #include <string> using namespace std; template<class T> T fromString(const string &str) { istringstream is(str); T v; is >> v; return v; } int main() { string sa = "3"; string saaa = "33.3"; int aa = 0; float bb = 0; aa = fromString<int>(sa); bb = fromString<float>(saaa); cout << aa << endl; cout << bb << endl; return 0; }