Convert number

Kien Bui

QString::number(number, 'f', 2)

When I put 1.3, 1, 1.1111
the console show: 1.30 1.00, 1.11
BUT How to remove the last 0 number: 1.3, 1, 1.11

Ratzz

@Kien-Bui
You can remove using QRegExp("0+$") .
In case of "1" you can use QRegExp("\\.$").

jsulm

@Kien-Bui Why do you want to remove it? It is doing exactly what you asked it to do: you want 2 digits after the dot, so it fills with 0.

Kien Bui

@Ratzz We can don't use QString::number(number, 'f', 2)
I only need input & output exactly

Ratzz

@Kien-Bui said in Convert number:

I only need input & output exactly

What do you mean?

Kien Bui

@Ratzz I don't want to use two RegExp for this.
I hope digit number after the dot, max is 2 or end of digit != 0

Ratzz

@Kien-Bui said in Convert number:

I don't want to use two RegExp for this.

Any problem with it?

I hope digit number after the dot, max is 2 or end of digit != 0

I still did not understand what u mean?

Kien Bui

I got a answer: QString::number(number, 'f', 2).remove(QRegExp("\\.*0*$"))

VRonin

int guessPrecision(double val, int maxdigits = 20){
        double junk;
        int precision = 0;
        for(;!qFuzzyIsNull(std::modf(val,&junk)) && precision<maxdigits ;++precision)
            val*=10.0;
        return precision;
    }

QString::number(number, 'f', guessPrecision(number,2))