How to Solve error C2039: “to_ String “: not a member of” STD “

To_string is a function only available in C++11. This error is probably the reason why it was used in older versions of C++Solutions:

#include <string>
#include <sstream>

template <typename T>
std::string to_string(T value)
	std::ostringstream os ;
	os << value ;
	return os.str() ;

int main()
	std::string perfect = to_string(5) ;

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