The data type of natural constant e is not defined in C++.

But they can be expressed by mathematical functions, but they cannot be expressed accurately, because e is an infinite decimal and the computer represents a certain value. If you use a mathematical expression to find this e on the computer, you might as well define it as a constant directly, with similar accuracy.

An algorithm is needed to calculate

# Contains? & ltiostream & gt

Use? Namespace? std？

int？ Master ()

{?

Double? e？ =? 1.0;

int？ n=？ 0; ?

Double? u？ =? 1.0;

do

{?

n？ ++;

u？ =? u/n；

e？ =? e+u；

} while(u & gt； = 1.0E-6)；

cout？ & lt& lt？ “e？ =? "？ & lt& lt？ e？ & lt& lt？" ? (? n？ =? "？ & lt& lt？ n？ & lt& lt？" ? )"? & lt& lt？ endl

Return? 0;

}