Matching printf Formatting with iomanip

Question

I have some old C code I'm trying to replicate the behavior of in C++. It uses the printf modifiers: "%06.02f".

I naively thought that iomanip was just as capable, and did:

cout << setfill('0') << setw(6) << setprecision(2)

When I try to output the test number 123.456, printf yields:

123.46

But cout yields:

1.2+e02

Is there anything I can do in iomanip to replicate this, or must I go back to using printf?

[Live Example]

Answer 1

Try std::fixed:

std::cout << std::fixed;

Sets the floatfield format flag for the str stream to fixed.

When floatfield is set to fixed, floating-point values are written using fixed-point notation: the value is represented with exactly as many digits in the decimal part as specified by the precision field (precision) and with no exponent part.