stringstream 을 통 해 자주 사용 하 는 형식 변환 인 스 턴 스 코드 를 실현 합 니 다.

template <class T>
void toString(string& result,const T &t)
{
  //           
  ostringstream oss;
  oss.clear();
  oss << t;
  result.clear();
  result = oss.str();
}

template <class T>
void stringToOther(T &t, const string &s)
{
  stringstream ss;
  ss.clear();
  ss << s;
  ss >> t;
}

template <class inputType,class outputType>
void toConvert(const inputType &input, outputType &output){

  stringstream ss;
  ss.clear();
  ss << input;
  ss >> output;
}

#include <sstream>
#include <iostream>
#include <string>
using namespace std;

template <class T>
void toString(string& result,const T& t);
template <class T>
void stringToOther(T &t, const string &s);
template <class inputType,class outputType>
void toConvert(const inputType &input, outputType &output);

int main(int argc, char** argv)
{
  string s1;
  double a =1.1111;
  toString(s1,a);
  cout<<s1<<endl;
  double b = 0;
  double &bptr =b;
  stringToOther(bptr,s1);
  cout<<bptr<<endl;

  string s2 ="2.222";
  double c1 =0;
  double &c1ptr = c1;
  toConvert(s2,c1ptr);
  cout<<c1ptr<<endl;

  return 0;
}

template <class T>
void toString(string& result,const T &t)
{
  //           
  ostringstream oss;
  oss.clear();
  oss << t;
  result.clear();
  result = oss.str();
}

template <class T>
void stringToOther(T &t, const string &s)
{
  stringstream ss;
  ss.clear();
  ss << s;
  ss >> t;
}

template <class inputType,class outputType>
void toConvert(const inputType &input, outputType &output){

  stringstream ss;
  ss.clear();
  ss << input;
  ss >> output;
}