(C++) std::scientific

 

std::scientific is a stream manipulator for real numbers to be displayed in the scientific notation.

 

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#include <iostream> int main() {   const double x = 123.456;   std::cout            << x << '\n'     << std::fixed      << x << '\n'     << std::scientific << x << '\n'; }

 

Screen output:

 

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123.456 123.456000 1.234560e+02