Remove traling zeros from QString scientific notation num value

[Ragna]

I have the next code, this code print a value in scientific notation, but i want to remove the trailing zeros

valor = 541; QString cStyleResult = QString::number(valor.toDouble(), 'e');

qDebug() << cStyleResult ;

//////////////////////////////////////////////
output: 5.410000e2

I want to remove the trailing zeros(right decimal zeros), example I want to save only the value of 5.41

some ideas????

[Ginsengelf]

Hi, you could
- specifiy a precision as the third parameter for QString::number
- you could use QString::arg() and play with fieldwidth and precision
- you could take your string, find the e or E of the scientific notation, and remove all zeroes in front of it (probably the ugliest method...)
- probably many more...

Ginsengelf

[CarloCole]

QString cStyleResult = QString::number(valor, 'e', 6); // Set precision to 6.
cStyleResult = cStyleResult.remove(QRegExp("0+$")); // Remove trailing zeros.
cStyleResult = cStyleResult.remove(QRegExp("\\.$")); // Remove trailing dot if any.
This should give you the desired output without trailing zeros.

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