Is there a floating point literal suffix in C++ to make a number double precision?

Question

I\'m currently working on a C++ project which does numerical calculations. The vast, vast majority of the code uses single precision floating point values and works perfectl

Answer 1

If you can afford GCC 4.7 or Clang 3.1, use a user-defined literal:

double operator "" _d(long double v) { return v; }

Usage:

std::cout << sizeof(1.0E200_d) << std::endl;
std::cout << 1.0E200_d << std::endl;

Result:

8
1e+200