change.h

编译原理

#ifndef P
#define P
#include <sstream>
template <class T>
T fromString (const std::string& s)
{
	std::istringstream is( s );
	T t;
	is >> t;
	return t;
}
template <class T>
std::string toString (const T& t)
{
	std::ostringstream s;
	s << t;
	return s.str();
}
#endif