CODEWITHSUNDEEP
c++
Rizvi
Rizvi

Reputation: 69

ios::base:precision & setprecision

What is the difference between ios::base:precision & setprecision Given in the following links? http://www.cplusplus.com/reference/ios/ios_base/precision/

http://www.cplusplus.com/reference/iomanip/setprecision/

Upvotes: 4

Views: 2755

Answers (2)

doctorlove
doctorlove

Reputation: 19262

The difference it to do with the usage. The first (setter) is a member function, so gets called like this:

std::cout.precision(10);

The second isn't a member function so is called different.

std::cout << std::setprecision(10);

The 2nd link explicitly says

"Behaves as if member precision were called with n as argument on the stream on which it is inserted/extracted as a manipulator "

Upvotes: 4

Marcus M&#252;ller
Marcus M&#252;ller

Reputation: 36352

Citing your second link:

Behaves as if member precision were called with n as argument on the stream on which it is inserted/extracted as a manipulator (it can be inserted/extracted on input streams or output streams).

Thus, there's no difference.

Upvotes: 0

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