double与string的相互转化（C++）

#include <sstream>using namespace std;/** * double转换为string */string convertToString(double d) { ostringstream os; if (os << d) return os.str(); return "invalid conversion";}/** * double转string */double convertFromString(string str) { istringstream iss(str); double x; if (iss >> x) return x; return 0.0;}