code. compile. run. debug. share.
#include <iostream>
#include <sstream>
template<typename type_t>
struct as_scientific
{
explicit as_scientific(type_t& v) : value{v}{};
type_t value;
};
template<typename type_t>
std::ostream& operator<<(std::ostream& os, const as_scientific<type_t>& scientific)
{
os << std::scientific << "((" << typeid(type_t).name() << ")(" << scientific.value << ")";
return os;
}
int main()
{
double d = 12.3;
std::ostringstream s;
s << "Hello World " << as_scientific{d} << "what a nice day.";
std::cout << s.str() << "\n";
// or directly
std::cout << as_scientific{d} << "\n";
}
Compiling Program...
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