scientific notation problem

[TheDoCtoR]

Hello everyone! I was messing around with code a bit and found out there is something strange happening with this code:

#include <iostream>

using namespace std;

int main(){

    float PlancksConst = 6.626e-34;

    cout << PlancksConst << endl;

    return 0;
}

The output should be "6.626e-34", but it's constantly outputting "6.626e-034". Why that extra zero? Is it a problem with the compiler? I'm using Codeblocks 12.11 and GNU GCC compiler. tnx :)

[Ozwurld]

http://www.cplusplus.com/reference/ios/scientific/

hehehe, theres also a zero in that example as well, #interesting!, maybe its just like that??

[TheDoCtoR]

Hmm, that's really strange... It's ok if it's just like that not doing anything, but it bugs me so much heheh. Anyone else knows the answer?

[long double main]

I think it's implementation-specific. (But someone correct me if I'm wrong)

For instance, this guy has the reverse problem -- he/she's only getting 2 digits when he/she wants three!
http://stackoverflow.com/questions/1257182/only-2-digits-in-exponent-in-scientific-ofstream

[Cubbi]

I get the output of

6.626e-34

with gcc, clang, intel, sun, and ibm compilers.

also, coliru has no zero either: http://coliru.stacked-crooked.com/a/6b17248e23081b0f